#577DFD
Closest named color: Cornflower (#6A79F7). oklch(62.9% 0.195 268), rgb(87, 125, 253).
Aa
Black text reads best on this color (5.75:1).
About this color
#577DFD is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.195 and its hue 268°. 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 5.75:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.195) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.75:1 |
| White text | 3.64:1 |
Values
| HEX | #577DFD |
| RGB | rgb(87, 125, 253) |
| HSL | hsl(226, 98%, 67%) |
| OKLCH | oklch(62.9% 0.195 268) |
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 #577DFD | 3.64:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #577DFD | 5.75:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #577DFD text on white | 3.64:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #577DFD text on black | 5.75:1 | AA | Lc -38.0 | 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
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FD
oklch(88.6% 0.052 267.4)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789BFF
oklch(70.8% 0.152 267.9)
-
Step 500
500 (this color)
#577DFD
oklch(62.9% 0.195 268)
-
Step 600
600
#4062ED
oklch(55.5% 0.212 268.1)
-
Step 700
700
#3350CE
oklch(49.1% 0.197 268.1)
-
Step 800
800
#2A43A7
oklch(42.8% 0.163 268)
-
Step 900
900
#253A84
oklch(37.7% 0.127 267.9)
-
Step 950
950
#16234D
oklch(27.1% 0.079 267.9)
#577DFD 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) | #308EFF | 0.047 |
| Deuteranopia (no green cones) | #007FFA | 0.048 |
| Tritanopia (no blue cones) | #009BB1 | 0.161 |
| Achromatopsia (no color) | #868686 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577DFD
#577DFD
oklch(62.9% 0.195 268)
- #A98300
#A98300
oklch(62.9% 0.129 88.1)
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 #577DFD, closest first.
No curated palette has a color within ΔE 0.04 of #577DFD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.024
- Clear Blue #247AFD ΔE 0.042
- Soft Blue #6488EA ΔE 0.046
- Dodger Blue #1E90FF ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.063
- Medium Slate Blue #7B68EE ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.068
- Royal Blue #4169E1 ΔE 0.070
Use #577DFD 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.