#051D3E
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.07 257), rgb(5, 29, 62).
Aa
White text reads best on this color (16.77:1).
About this color
#051D3E is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.070 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 16.77:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.77:1 |
Values
| HEX | #051D3E |
| RGB | rgb(5, 29, 62) |
| HSL | hsl(215, 85%, 13%) |
| OKLCH | oklch(23.4% 0.07 257) |
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 #051D3E | 16.77:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #051D3E | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #051D3E text on white | 16.77:1 | AAA | Lc 103.5 | Preferred for body text |
| #051D3E text on black | 1.25:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#69A2F2
oklch(70.7% 0.132 257)
-
Step 500
500
#3D88EE
oklch(63.1% 0.17 257.1)
-
Step 600
600
#176FDC
oklch(55.6% 0.184 257.1)
-
Step 700
700
#055CBF
oklch(49.1% 0.172 257.1)
-
Step 800
800
#0C4C9A
oklch(42.7% 0.141 256.9)
-
Step 900
900
#14407B
oklch(37.7% 0.111 257.2)
-
Step 950
950 (this color)
#051D3E
oklch(23.4% 0.07 257)
#051D3E 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) | #0B203F | 0.013 |
| Deuteranopia (no green cones) | #001B3D | 0.010 |
| Tritanopia (no blue cones) | #00252A | 0.054 |
| Achromatopsia (no color) | #1D1D1D | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051D3E
#051D3E
oklch(23.4% 0.07 257)
- #2B1A00
#2B1A00
oklch(23.4% 0.049 75.8)
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 #051D3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Navy Blue #001146 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.045
- Dark #1B2431 ΔE 0.048
- Jet #212529 ΔE 0.067
- Night Blue #040348 ΔE 0.068
- Dark Indigo #1F0954 ΔE 0.069
- Marine #042E60 ΔE 0.078
Use #051D3E 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.