#577CD7
Closest named color: Soft Blue (#6488EA). oklch(60.3% 0.145 265.6), rgb(87, 124, 215).
Aa
Black text reads best on this color (5.26:1).
About this color
#577CD7 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.145 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.044 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #577CD7 |
| RGB | rgb(87, 124, 215) |
| HSL | hsl(223, 62%, 59%) |
| OKLCH | oklch(60.3% 0.145 265.6) |
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 #577CD7 | 3.98:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #577CD7 | 5.26:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #577CD7 text on white | 3.98:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #577CD7 text on black | 5.26:1 | AA | Lc -34.7 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ABC0EF
oklch(80.8% 0.071 266)
-
Step 400
400
#7F9FE8
oklch(70.8% 0.113 265.5)
-
Step 500
500 (this color)
#577CD7
oklch(60.3% 0.145 265.6)
-
Step 600
600
#466CCE
oklch(55.5% 0.157 265.6)
-
Step 700
700
#385AB3
oklch(49.1% 0.147 265.6)
-
Step 800
800
#2F4A91
oklch(42.8% 0.122 265.8)
-
Step 900
900
#293E73
oklch(37.6% 0.095 265.8)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#577CD7 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) | #5386DB | 0.026 |
| Deuteranopia (no green cones) | #417AD5 | 0.024 |
| Tritanopia (no blue cones) | #00909F | 0.125 |
| Achromatopsia (no color) | #7F7F7F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577CD7
#577CD7
oklch(60.3% 0.145 265.6)
- #A27A00
#A27A00
oklch(60.2% 0.123 85.5)
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 #577CD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.048
- Windows Blue #3778BF ΔE 0.051
- Cornflower #6A79F7 ΔE 0.055
- Water Blue #0E87CC ΔE 0.057
- Cool Blue #4984B8 ΔE 0.059
- Royal Blue #4169E1 ΔE 0.061
- Steel Blue #4682B4 ΔE 0.063
Use #577CD7 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.