#577FF0
Closest named color: Cornflower (#6A79F7). oklch(62.5% 0.175 266.7), rgb(87, 127, 240).
Aa
Black text reads best on this color (5.69:1).
About this color
#577FF0 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.175 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.028 away. Black text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.69:1 |
| White text | 3.68:1 |
Values
| HEX | #577FF0 |
| RGB | rgb(87, 127, 240) |
| HSL | hsl(224, 84%, 64%) |
| OKLCH | oklch(62.5% 0.175 266.7) |
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 #577FF0 | 3.68:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #577FF0 | 5.69:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #577FF0 text on white | 3.68:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #577FF0 text on black | 5.69:1 | AA | Lc -37.6 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A7C0F9
oklch(80.9% 0.086 266.1)
-
Step 400
400
#799DF6
oklch(70.8% 0.137 266.3)
-
Step 500
500 (this color)
#577FF0
oklch(62.5% 0.175 266.7)
-
Step 600
600
#4067E1
oklch(55.5% 0.191 266.7)
-
Step 700
700
#3355C3
oklch(49.1% 0.176 266.7)
-
Step 800
800
#2A469E
oklch(42.6% 0.147 266.7)
-
Step 900
900
#263C7D
oklch(37.7% 0.114 266.8)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#577FF0 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) | #458CF4 | 0.034 |
| Deuteranopia (no green cones) | #267FEE | 0.039 |
| Tritanopia (no blue cones) | #0099AC | 0.147 |
| Achromatopsia (no color) | #858585 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577FF0
#577FF0
oklch(62.5% 0.175 266.7)
- #A98100
#A98100
oklch(62.5% 0.128 86.7)
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 #577FF0, closest first.
No curated palette has a color within ΔE 0.04 of #577FF0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.028
- Soft Blue #6488EA ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.047
- Clear Blue #247AFD ΔE 0.048
- Dodger Blue #1E90FF ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.062
- Royal Blue #4169E1 ΔE 0.066
Use #577FF0 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.