#002133
Closest named color: Rich Black (#0D1B2A). oklch(23.5% 0.051 237.1), rgb(0, 33, 51).
Aa
White text reads best on this color (16.59:1).
About this color
#002133 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.051 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 16.59:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.59:1 |
Values
| HEX | #002133 |
| RGB | rgb(0, 33, 51) |
| HSL | hsl(201, 100%, 10%) |
| OKLCH | oklch(23.5% 0.051 237.1) |
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 #002133 | 16.59:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #002133 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #002133 text on white | 16.59:1 | AAA | Lc 103.3 | Preferred for body text |
| #002133 text on black | 1.26:1 | 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
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C5DDED
oklch(88.5% 0.034 237)
-
Step 300
300
#9CC7E3
oklch(80.8% 0.06 237)
-
Step 400
400
#61AAD6
oklch(70.8% 0.098 236.8)
-
Step 500
500
#2993CB
oklch(63% 0.125 237.4)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#034767
oklch(37.7% 0.081 237.2)
-
Step 950
950 (this color)
#002133
oklch(23.5% 0.051 237.1)
#002133 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) | #182134 | 0.028 |
| Deuteranopia (no green cones) | #111C33 | 0.024 |
| Tritanopia (no blue cones) | #002627 | 0.034 |
| Achromatopsia (no color) | #1E1E1E | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #002133
#002133
oklch(23.5% 0.051 237.1)
- #301703
#301703
oklch(23.6% 0.051 57.2)
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 #002133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Dark #1B2431 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.041
- Jet #212529 ΔE 0.050
- Navy Blue #001146 ΔE 0.065
- Rich Navy #001219 ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.078
- Gunmetal #293241 ΔE 0.085
Use #002133 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.