#052039
Closest named color: Rich Black (#0D1B2A). oklch(23.9% 0.058 249.8), rgb(5, 32, 57).
Aa
White text reads best on this color (16.50:1).
About this color
#052039 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.058 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.031 away. White text reads best on it, at 16.50:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.50:1 |
Values
| HEX | #052039 |
| RGB | rgb(5, 32, 57) |
| HSL | hsl(209, 84%, 12%) |
| OKLCH | oklch(23.9% 0.058 249.8) |
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 #052039 | 16.50:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #052039 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #052039 text on white | 16.50:1 | AAA | Lc 103.2 | Preferred for body text |
| #052039 text on black | 1.27:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#9FC5EC
oklch(80.9% 0.069 249.4)
-
Step 400
400
#69A5E2
oklch(70.6% 0.11 250)
-
Step 500
500
#3B8EDA
oklch(63.2% 0.14 249.4)
-
Step 600
600
#0B76C8
oklch(55.6% 0.153 249.8)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#04518C
oklch(42.7% 0.118 249.7)
-
Step 900
900
#124470
oklch(37.8% 0.091 249.5)
-
Step 950
950 (this color)
#052039
oklch(23.9% 0.058 249.8)
#052039 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) | #14213A | 0.018 |
| Deuteranopia (no green cones) | #0C1D39 | 0.011 |
| Tritanopia (no blue cones) | #002629 | 0.043 |
| Achromatopsia (no color) | #1F1F1F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #052039
#052039
oklch(23.9% 0.058 249.8)
- #2E1A00
#2E1A00
oklch(23.9% 0.051 70.9)
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 #052039, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.031
- Oxford Blue #1B263B ΔE 0.036
- Dark #1B2431 ΔE 0.036
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.073
- Rich Navy #001219 ΔE 0.077
- Marine #042E60 ΔE 0.080
Use #052039 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.