#51608F
Closest named color: Dusky Blue (#475F94). oklch(49.7% 0.078 269.9), rgb(81, 96, 143).
Aa
White text reads best on this color (6.14:1).
About this color
#51608F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.078 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.016 away. White text reads best on it, at 6.14:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #51608F |
| RGB | rgb(81, 96, 143) |
| HSL | hsl(225, 28%, 44%) |
| OKLCH | oklch(49.7% 0.078 269.9) |
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 #51608F | 6.14:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #51608F | 3.41:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #51608F text on white | 6.14:1 | AA | Lc 80.6 | Fine for body text |
| #51608F text on black | 3.41:1 | AA large text | Lc -21.3 | 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
#B7C0DA
oklch(80.9% 0.038 270.4)
-
Step 400
400
#929FC7
oklch(70.6% 0.061 270.8)
-
Step 500
500
#7787B9
oklch(63% 0.078 270.4)
-
Step 600
600
#6071A5
oklch(55.7% 0.084 269.7)
-
Step 700
700 (this color)
#51608F
oklch(49.7% 0.078 269.9)
-
Step 800
800
#414D73
oklch(42.7% 0.065 270.1)
-
Step 900
900
#37405D
oklch(37.6% 0.051 270.6)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#51608F 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) | #506491 | 0.011 |
| Deuteranopia (no green cones) | #4A5F8E | 0.010 |
| Tritanopia (no blue cones) | #3C6A71 | 0.070 |
| Achromatopsia (no color) | #626262 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51608F
#51608F
oklch(49.7% 0.078 269.9)
- #746029
#746029
oklch(49.7% 0.078 89.3)
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 #51608F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.016
- Denim #3B638C ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.034
- Dusk #4E5481 ΔE 0.038
- Twilight #4E518B ΔE 0.043
- Dusty Grape #545775 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.049
Use #51608F 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.