#577DE8
Closest named color: Cornflower (#6A79F7). oklch(61.5% 0.167 266.8), rgb(87, 125, 232).
Aa
Black text reads best on this color (5.50:1).
About this color
#577DE8 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.167 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.034 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #577DE8 |
| RGB | rgb(87, 125, 232) |
| HSL | hsl(224, 76%, 63%) |
| OKLCH | oklch(61.5% 0.167 266.8) |
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 #577DE8 | 3.81:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #577DE8 | 5.50:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #577DE8 text on white | 3.81:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #577DE8 text on black | 5.50:1 | AA | Lc -36.3 | 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
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7C9DF2
oklch(70.7% 0.13 267)
-
Step 500
500 (this color)
#577DE8
oklch(61.5% 0.167 266.8)
-
Step 600
600
#4369DC
oklch(55.7% 0.181 266.7)
-
Step 700
700
#3556BF
oklch(49.1% 0.169 266.8)
-
Step 800
800
#2C479A
oklch(42.6% 0.139 266.8)
-
Step 900
900
#273D7B
oklch(37.8% 0.109 266.5)
-
Step 950
950
#172448
oklch(27% 0.069 266.8)
#577DE8 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) | #488AEC | 0.034 |
| Deuteranopia (no green cones) | #2E7CE6 | 0.036 |
| Tritanopia (no blue cones) | #0095A7 | 0.141 |
| Achromatopsia (no color) | #838383 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577DE8
#577DE8
oklch(61.5% 0.167 266.8)
- #A57E00
#A57E00
oklch(61.4% 0.126 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 #577DE8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.034
- Soft Blue #6488EA ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.047
- Clear Blue #247AFD ΔE 0.052
- Royal Blue #4169E1 ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.060
- Chefchaouen Blue #4895EF ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.065
Use #577DE8 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.