#577FF7
Closest named color: Cornflower (#6A79F7). oklch(62.9% 0.185 267.1), rgb(87, 127, 247).
Aa
Black text reads best on this color (5.78:1).
About this color
#577FF7 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.185 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.024 away. Black text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #577FF7 |
| RGB | rgb(87, 127, 247) |
| HSL | hsl(225, 91%, 65%) |
| OKLCH | oklch(62.9% 0.185 267.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #577FF7 | 3.63:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #577FF7 | 5.78:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #577FF7 text on white | 3.63:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #577FF7 text on black | 5.78:1 | AA | Lc -38.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A7BFFC
oklch(80.9% 0.091 267.7)
-
Step 400
400
#789CFA
oklch(70.7% 0.144 266.9)
-
Step 500
500 (this color)
#577FF7
oklch(62.9% 0.185 267.1)
-
Step 600
600
#3F65E7
oklch(55.6% 0.201 267.1)
-
Step 700
700
#3253C8
oklch(49.1% 0.186 267.1)
-
Step 800
800
#2945A2
oklch(42.7% 0.154 266.9)
-
Step 900
900
#253B81
oklch(37.7% 0.121 267.2)
-
Step 950
950
#16234B
oklch(26.9% 0.076 267.6)
#577FF7 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #3D8EFB | 0.040 |
| Deuteranopia (no green cones) | #117FF5 | 0.046 |
| Tritanopia (no blue cones) | #009BAF | 0.154 |
| Achromatopsia (no color) | #868686 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577FF7
#577FF7
oklch(62.9% 0.185 267.1)
- #AA8300
#AA8300
oklch(63% 0.129 87.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #577FF7, closest first.
No curated palette has a color within ΔE 0.04 of #577FF7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.024
- Soft Blue #6488EA ΔE 0.036
- Clear Blue #247AFD ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.060
- Cornflower Blue #6495ED ΔE 0.065
- Medium Slate Blue #7B68EE ΔE 0.066
Use #577FF7 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.