#051737
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.067 260.2), rgb(5, 23, 55).
Aa
White text reads best on this color (17.73:1).
About this color
#051737 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.067 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.033 away. White text reads best on it, at 17.73:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.73:1 |
Values
| HEX | #051737 |
| RGB | rgb(5, 23, 55) |
| HSL | hsl(218, 83%, 12%) |
| OKLCH | oklch(21.2% 0.067 260.2) |
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 #051737 | 17.73:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #051737 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #051737 text on white | 17.73:1 | AAA | Lc 104.3 | Preferred for body text |
| #051737 text on black | 1.18:1 | 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
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A3C2F5
oklch(80.9% 0.08 260.3)
-
Step 400
400
#71A0F0
oklch(70.6% 0.128 260.6)
-
Step 500
500
#4B86EB
oklch(63% 0.164 260.4)
-
Step 600
600
#2E6ED9
oklch(55.7% 0.177 260.2)
-
Step 700
700
#215BBC
oklch(49.1% 0.165 260.2)
-
Step 800
800
#1D4B98
oklch(42.7% 0.136 260.2)
-
Step 900
900
#1D3F79
oklch(37.6% 0.107 260.4)
-
Step 950
950 (this color)
#051737
oklch(21.2% 0.067 260.2)
#051737 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) | #051B38 | 0.013 |
| Deuteranopia (no green cones) | #001636 | 0.009 |
| Tritanopia (no blue cones) | #001F24 | 0.053 |
| Achromatopsia (no color) | #181818 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051737
#051737
oklch(21.2% 0.067 260.2)
- #231600
#231600
oklch(21.2% 0.044 80.4)
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 #051737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Navy Blue #001146 ΔE 0.035
- Night Blue #040348 ΔE 0.058
- Dark Navy #000435 ΔE 0.059
- Dark #1B2431 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.063
- Rich Navy #001219 ΔE 0.063
- Very Dark Blue #000133 ΔE 0.071
Use #051737 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.