#051939
Closest named color: Rich Black (#0D1B2A). oklch(21.9% 0.068 259), rgb(5, 25, 57).
Aa
White text reads best on this color (17.43:1).
About this color
#051939 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.068 and its hue 259°. 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 17.43:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.43:1 |
Values
| HEX | #051939 |
| RGB | rgb(5, 25, 57) |
| HSL | hsl(217, 84%, 12%) |
| OKLCH | oklch(21.9% 0.068 259) |
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 #051939 | 17.43:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #051939 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #051939 text on white | 17.43:1 | AAA | Lc 104.1 | Preferred for body text |
| #051939 text on black | 1.20:1 | 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
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#6EA1F0
oklch(70.7% 0.129 258.9)
-
Step 500
500
#4787EB
oklch(63.1% 0.165 259.1)
-
Step 600
600
#286ED9
oklch(55.5% 0.178 259.1)
-
Step 700
700
#1A5CBC
oklch(49.2% 0.165 258.8)
-
Step 800
800
#184B98
oklch(42.6% 0.137 259)
-
Step 900
900
#1A4079
oklch(37.7% 0.106 258.6)
-
Step 950
950 (this color)
#051939
oklch(21.9% 0.068 259)
#051939 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) | #071C3A | 0.011 |
| Deuteranopia (no green cones) | #001838 | 0.008 |
| Tritanopia (no blue cones) | #002126 | 0.052 |
| Achromatopsia (no color) | #1A1A1A | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051939
#051939
oklch(21.9% 0.068 259)
- #261700
#261700
oklch(21.9% 0.046 77.1)
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 #051939, 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 0.036
- Dark #1B2431 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.056
- Night Blue #040348 ΔE 0.061
- Dark Navy #000435 ΔE 0.066
- Rich Navy #001219 ΔE 0.068
- Dark Indigo #1F0954 ΔE 0.072
Use #051939 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.