#57648B
Closest named color: Dusky Blue (#475F94). oklch(50.8% 0.064 269.8), rgb(87, 100, 139).
Aa
White text reads best on this color (5.83:1).
About this color
#57648B is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.064 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.032 away. White text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.60:1 |
| White text | 5.83:1 |
Values
| HEX | #57648B |
| RGB | rgb(87, 100, 139) |
| HSL | hsl(225, 23%, 44%) |
| OKLCH | oklch(50.8% 0.064 269.8) |
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 #57648B | 5.83:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #57648B | 3.60:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #57648B text on white | 5.83:1 | AA | Lc 79.1 | Fine for body text |
| #57648B text on black | 3.60:1 | AA large text | Lc -22.7 | 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 700.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E5
oklch(88.5% 0.017 267.8)
-
Step 300
300
#B8C0D5
oklch(80.8% 0.031 269.1)
-
Step 400
400
#94A0C0
oklch(70.7% 0.049 269)
-
Step 500
500
#7A88B1
oklch(63.1% 0.064 269.9)
-
Step 600
600
#63729C
oklch(55.7% 0.068 269)
-
Step 700
700 (this color)
#57648B
oklch(50.8% 0.064 269.8)
-
Step 800
800
#434E6D
oklch(42.8% 0.054 269)
-
Step 900
900
#394158
oklch(37.8% 0.041 269.5)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#57648B 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) | #57678D | 0.009 |
| Deuteranopia (no green cones) | #53638A | 0.007 |
| Tritanopia (no blue cones) | #476C72 | 0.058 |
| Achromatopsia (no color) | #656565 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57648B
#57648B
oklch(50.8% 0.064 269.8)
- #746439
#746439
oklch(50.8% 0.064 89.6)
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 #57648B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.032
- Denim #3B638C ΔE 0.035
- Metallic Blue #4F738E ΔE 0.043
- Slate #516572 ΔE 0.043
- Dusty Grape #545775 ΔE 0.046
- Muted Blue #3B719F ΔE 0.049
- Dusk #4E5481 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.050
Use #57648B 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.