#577AFF
Closest named color: Cornflower (#6A79F7). oklch(62.5% 0.201 268.8), rgb(87, 122, 255).
Aa
Black text reads best on this color (5.63:1).
About this color
#577AFF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.201 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.025 away. Black text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.63:1 |
| White text | 3.72:1 |
Values
| HEX | #577AFF |
| RGB | rgb(87, 122, 255) |
| HSL | hsl(228, 100%, 67%) |
| OKLCH | oklch(62.5% 0.201 268.8) |
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 #577AFF | 3.72:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #577AFF | 5.63:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #577AFF text on white | 3.72:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #577AFF text on black | 5.63:1 | AA | Lc -37.2 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FE
oklch(88.4% 0.055 269.3)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500 (this color)
#577AFF
oklch(62.5% 0.201 268.8)
-
Step 600
600
#4260F1
oklch(55.6% 0.219 269)
-
Step 700
700
#344ED1
oklch(49% 0.203 268.8)
-
Step 800
800
#2B41A9
oklch(42.6% 0.168 268.8)
-
Step 900
900
#263986
oklch(37.7% 0.131 268.8)
-
Step 950
950
#16224E
oklch(26.9% 0.083 268.8)
#577AFF 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) | #208CFF | 0.053 |
| Deuteranopia (no green cones) | #007DFC | 0.049 |
| Tritanopia (no blue cones) | #009AB1 | 0.166 |
| Achromatopsia (no color) | #848484 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577AFF
#577AFF
oklch(62.5% 0.201 268.8)
- #A78200
#A78200
oklch(62.5% 0.128 88.5)
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 #577AFF, closest first.
No curated palette has a color within ΔE 0.04 of #577AFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.025
- Clear Blue #247AFD ΔE 0.040
- Soft Blue #6488EA ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.061
- Royal Blue #4169E1 ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.070
- Neon Blue #4361EE ΔE 0.070
Use #577AFF 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.