#57648C
Closest named color: Dusky Blue (#475F94). oklch(50.9% 0.066 270.1), rgb(87, 100, 140).
Aa
White text reads best on this color (5.82:1).
About this color
#57648C is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.066 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.031 away. White text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.60:1 |
| White text | 5.82:1 |
Values
| HEX | #57648C |
| RGB | rgb(87, 100, 140) |
| HSL | hsl(225, 23%, 45%) |
| OKLCH | oklch(50.9% 0.066 270.1) |
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 #57648C | 5.82:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #57648C | 3.60:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #57648C text on white | 5.82:1 | AA | Lc 79.1 | Fine for body text |
| #57648C 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
#B8C0D6
oklch(80.9% 0.032 269.8)
-
Step 400
400
#94A0C1
oklch(70.8% 0.05 269.4)
-
Step 500
500
#7A88B2
oklch(63.1% 0.066 270.2)
-
Step 600
600
#63719D
oklch(55.5% 0.071 270.4)
-
Step 700
700 (this color)
#57648C
oklch(50.9% 0.066 270.1)
-
Step 800
800
#434E6D
oklch(42.8% 0.054 269)
-
Step 900
900
#394159
oklch(37.8% 0.043 270)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#57648C 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) | #57688E | 0.011 |
| Deuteranopia (no green cones) | #52638B | 0.008 |
| Tritanopia (no blue cones) | #476C72 | 0.059 |
| Achromatopsia (no color) | #656565 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57648C
#57648C
oklch(50.9% 0.066 270.1)
- #746438
#746438
oklch(50.8% 0.065 90)
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 #57648C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.031
- Denim #3B638C ΔE 0.035
- Metallic Blue #4F738E ΔE 0.044
- Slate #516572 ΔE 0.045
- Dusty Grape #545775 ΔE 0.047
- Muted Blue #3B719F ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.049
- Dull Blue #49759C ΔE 0.050
Use #57648C 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.