#02182B
Closest named color: Rich Black (#0D1B2A). oklch(20.3% 0.048 246.4), rgb(2, 24, 43).
Aa
White text reads best on this color (17.97:1).
About this color
#02182B is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.048 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 17.97:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.97:1 |
Values
| HEX | #02182B |
| RGB | rgb(2, 24, 43) |
| HSL | hsl(208, 91%, 9%) |
| OKLCH | oklch(20.3% 0.048 246.4) |
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 #02182B | 17.97:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #02182B | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #02182B text on white | 17.97:1 | AAA | Lc 104.5 | Preferred for body text |
| #02182B text on black | 1.16:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E4
oklch(80.9% 0.057 246.1)
-
Step 400
400
#70A6D6
oklch(70.6% 0.091 246.3)
-
Step 500
500
#478FCC
oklch(63.1% 0.117 246.6)
-
Step 600
600
#2478B8
oklch(55.5% 0.126 246.3)
-
Step 700
700
#15659F
oklch(49.1% 0.118 246.3)
-
Step 800
800
#165381
oklch(42.8% 0.097 246.1)
-
Step 900
900
#1A4567
oklch(37.8% 0.075 245.6)
-
Step 950
950 (this color)
#02182B
oklch(20.3% 0.048 246.4)
#02182B 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) | #0F192C | 0.019 |
| Deuteranopia (no green cones) | #08152B | 0.012 |
| Tritanopia (no blue cones) | #001D1F | 0.035 |
| Achromatopsia (no color) | #171717 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02182B
#02182B
oklch(20.3% 0.048 246.4)
- #241200
#241200
oklch(20.3% 0.045 67.2)
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 #02182B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Rich Navy #001219 ΔE 0.041
- Navy Blue #001146 ΔE 0.058
- Dark #1B2431 ΔE 0.059
- Almost Black #070D0D ΔE 0.066
- Dark Navy #000435 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.068
- Jet #212529 ΔE 0.071
Use #02182B 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.