#51628E
Closest named color: Dusky Blue (#475F94). oklch(50.1% 0.074 267.6), rgb(81, 98, 142).
Aa
White text reads best on this color (6.02:1).
About this color
#51628E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.074 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.020 away. White text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #51628E |
| RGB | rgb(81, 98, 142) |
| HSL | hsl(223, 27%, 44%) |
| OKLCH | oklch(50.1% 0.074 267.6) |
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 #51628E | 6.02:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #51628E | 3.48:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #51628E text on white | 6.02:1 | AA | Lc 80.0 | Fine for body text |
| #51628E text on black | 3.48:1 | AA large text | Lc -21.8 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B6C0D8
oklch(80.8% 0.036 267.6)
-
Step 400
400
#91A0C5
oklch(70.7% 0.057 267.7)
-
Step 500
500
#7688B6
oklch(63% 0.073 267.8)
-
Step 600
600
#5F72A2
oklch(55.7% 0.078 267.3)
-
Step 700
700 (this color)
#51628E
oklch(50.1% 0.074 267.6)
-
Step 800
800
#404E71
oklch(42.7% 0.061 267.1)
-
Step 900
900
#36415B
oklch(37.7% 0.047 266.5)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#51628E 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) | #536690 | 0.012 |
| Deuteranopia (no green cones) | #4D608D | 0.008 |
| Tritanopia (no blue cones) | #3C6B72 | 0.065 |
| Achromatopsia (no color) | #636363 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51628E
#51628E
oklch(50.1% 0.074 267.6)
- #75612E
#75612E
oklch(50.1% 0.074 88.1)
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 #51628E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.020
- Denim #3B638C ΔE 0.027
- Denim Blue #3B5B92 ΔE 0.038
- Dusk #4E5481 ΔE 0.042
- Dusty Grape #545775 ΔE 0.045
- Muted Blue #3B719F ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
- Twilight #4E518B ΔE 0.049
Use #51628E 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.