#577DD4
Closest named color: Soft Blue (#6488EA). oklch(60.3% 0.14 264.8), rgb(87, 125, 212).
Aa
Black text reads best on this color (5.28:1).
About this color
#577DD4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.140 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.045 away. Black text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #577DD4 |
| RGB | rgb(87, 125, 212) |
| HSL | hsl(222, 59%, 59%) |
| OKLCH | oklch(60.3% 0.14 264.8) |
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 #577DD4 | 3.97:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #577DD4 | 5.28:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #577DD4 text on white | 3.97:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #577DD4 text on black | 5.28:1 | AA | Lc -34.8 | 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
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1EE
oklch(81% 0.068 264.5)
-
Step 400
400
#7F9FE5
oklch(70.7% 0.109 265)
-
Step 500
500 (this color)
#577DD4
oklch(60.3% 0.14 264.8)
-
Step 600
600
#466ECB
oklch(55.7% 0.151 264.5)
-
Step 700
700
#385BB0
oklch(49.1% 0.141 264.8)
-
Step 800
800
#2E4B8E
oklch(42.7% 0.116 264.4)
-
Step 900
900
#293F72
oklch(37.7% 0.092 264.8)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#577DD4 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) | #5786D7 | 0.024 |
| Deuteranopia (no green cones) | #467AD2 | 0.021 |
| Tritanopia (no blue cones) | #00909E | 0.122 |
| Achromatopsia (no color) | #808080 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577DD4
#577DD4
oklch(60.3% 0.14 264.8)
- #A37A00
#A37A00
oklch(60.3% 0.124 84.9)
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 #577DD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.047
- Windows Blue #3778BF ΔE 0.048
- Cool Blue #4984B8 ΔE 0.054
- Water Blue #0E87CC ΔE 0.054
- Steel Blue #4682B4 ΔE 0.058
- Cornflower #6A79F7 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.065
Use #577DD4 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.