#51608D
Closest named color: Dusky Blue (#475F94). oklch(49.6% 0.075 269.5), rgb(81, 96, 141).
Aa
White text reads best on this color (6.16:1).
About this color
#51608D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.075 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.018 away. White text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #51608D |
| RGB | rgb(81, 96, 141) |
| HSL | hsl(225, 27%, 44%) |
| OKLCH | oklch(49.6% 0.075 269.5) |
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 #51608D | 6.16:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #51608D | 3.40:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #51608D text on white | 6.16:1 | AA | Lc 80.7 | Fine for body text |
| #51608D text on black | 3.40:1 | AA large text | Lc -21.2 | 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
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B7C0D9
oklch(80.9% 0.037 269.8)
-
Step 400
400
#92A0C6
oklch(70.8% 0.058 269.1)
-
Step 500
500
#7788B7
oklch(63.1% 0.074 268.9)
-
Step 600
600
#6071A3
oklch(55.6% 0.081 269.3)
-
Step 700
700 (this color)
#51608D
oklch(49.6% 0.075 269.5)
-
Step 800
800
#414D71
oklch(42.6% 0.062 269.5)
-
Step 900
900
#37405C
oklch(37.6% 0.05 270.2)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#51608D 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) | #50648F | 0.011 |
| Deuteranopia (no green cones) | #4B5F8C | 0.009 |
| Tritanopia (no blue cones) | #3D6970 | 0.067 |
| Achromatopsia (no color) | #616161 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51608D
#51608D
oklch(49.6% 0.075 269.5)
- #73602C
#73602C
oklch(49.6% 0.075 89.4)
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 #51608D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.018
- Denim #3B638C ΔE 0.027
- Denim Blue #3B5B92 ΔE 0.035
- Dusk #4E5481 ΔE 0.037
- Dusty Grape #545775 ΔE 0.041
- Twilight #4E518B ΔE 0.044
- YInMn Blue #415A77 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.048
Use #51608D 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.