#57729C
Closest named color: Dull Blue (#49759C). oklch(54.8% 0.073 259), rgb(87, 114, 156).
Aa
White text reads best on this color (4.89:1).
About this color
#57729C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.073 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.017 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.29:1 |
| White text | 4.89:1 |
Values
| HEX | #57729C |
| RGB | rgb(87, 114, 156) |
| HSL | hsl(217, 28%, 48%) |
| OKLCH | oklch(54.8% 0.073 259) |
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 #57729C | 4.89:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #57729C | 4.29:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #57729C text on white | 4.89:1 | AA | Lc 73.8 | Content text, not long reading |
| #57729C text on black | 4.29:1 | AA large text | Lc -27.9 | Dividers and decoration only |
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 600.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B4C2D6
oklch(81% 0.032 257.2)
-
Step 400
400
#8DA2C2
oklch(70.7% 0.053 258.7)
-
Step 500
500
#718BB3
oklch(63.2% 0.068 258.9)
-
Step 600
600 (this color)
#57729C
oklch(54.8% 0.073 259)
-
Step 700
700
#496187
oklch(49% 0.068 259.4)
-
Step 800
800
#3C506E
oklch(42.8% 0.056 258.3)
-
Step 900
900
#334259
oklch(37.6% 0.044 258.8)
-
Step 950
950
#1E2734
oklch(27% 0.028 257.5)
#57729C 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) | #63749E | 0.018 |
| Deuteranopia (no green cones) | #5B6E9B | 0.012 |
| Tritanopia (no blue cones) | #3D7B81 | 0.064 |
| Achromatopsia (no color) | #717171 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57729C
#57729C
oklch(54.8% 0.073 259)
- #886C3D
#886C3D
oklch(54.8% 0.073 79.2)
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 #57729C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.017
- Metallic Blue #4F738E ΔE 0.026
- Stormy Blue #507B9C ΔE 0.027
- Cerulean #457B9D ΔE 0.030
- Muted Blue #3B719F ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.033
- French Blue #436BAD ΔE 0.045
- Grey Blue #647D8E ΔE 0.048
Use #57729C 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.