#577CED
Closest named color: Cornflower (#6A79F7). oklch(61.7% 0.175 267.5), rgb(87, 124, 237).
Aa
Black text reads best on this color (5.51:1).
About this color
#577CED is a medium-dark, 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 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.51:1 |
| White text | 3.81:1 |
Values
| HEX | #577CED |
| RGB | rgb(87, 124, 237) |
| HSL | hsl(225, 81%, 64%) |
| OKLCH | oklch(61.7% 0.175 267.5) |
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 #577CED | 3.81:1 | AA large text | Lc -70.8 | Content text, not long reading |
| Black text on #577CED | 5.51:1 | AA | Lc 38.8 | Non-text elements, placeholder text |
| #577CED text on white | 3.81:1 | AA large text | Lc 65.3 | Content text, not long reading |
| #577CED text on black | 5.51:1 | AA | Lc -36.4 | 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
#A8BFF9
oklch(80.8% 0.086 267.7)
-
Step 400
400
#7B9CF6
oklch(70.7% 0.137 267.6)
-
Step 500
500 (this color)
#577CED
oklch(61.7% 0.175 267.5)
-
Step 600
600
#4367E1
oklch(55.7% 0.19 267.4)
-
Step 700
700
#3554C3
oklch(49% 0.177 267.5)
-
Step 800
800
#2C469E
oklch(42.7% 0.146 267.4)
-
Step 900
900
#273C7D
oklch(37.7% 0.113 267.3)
-
Step 950
950
#172449
oklch(27.1% 0.071 267.1)
#577CED 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) | #418AF1 | 0.037 |
| Deuteranopia (no green cones) | #217CEB | 0.042 |
| Tritanopia (no blue cones) | #0096A9 | 0.147 |
| Achromatopsia (no color) | #838383 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577CED
#577CED
oklch(61.7% 0.175 267.5)
- #A57F00
#A57F00
oklch(61.6% 0.126 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 #577CED, closest first.
No curated palette has a color within ΔE 0.04 of #577CED.
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 0.037
- Clear Blue #247AFD ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.052
- Royal Blue #4169E1 ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.059
- Medium Slate Blue #7B68EE ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.064
Use #577CED 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.