#00213E
Closest named color: Oxford Blue (#1B263B). oklch(24.3% 0.067 249), rgb(0, 33, 62).
Aa
White text reads best on this color (16.31:1).
About this color
#00213E is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.067 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.038 away. White text reads best on it, at 16.31:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.31:1 |
Values
| HEX | #00213E |
| RGB | rgb(0, 33, 62) |
| HSL | hsl(208, 100%, 12%) |
| OKLCH | oklch(24.3% 0.067 249) |
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 #00213E | 16.31:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #00213E | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #00213E text on white | 16.31:1 | AAA | Lc 103.0 | Preferred for body text |
| #00213E text on black | 1.28:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF9
oklch(93.7% 0.022 248.1)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#99C5F2
oklch(80.8% 0.079 249.4)
-
Step 400
400
#5CA6EC
oklch(70.7% 0.127 248.9)
-
Step 500
500
#1F8DE6
oklch(63% 0.163 249.1)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950 (this color)
#00213E
oklch(24.3% 0.067 249)
#00213E 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) | #12233F | 0.021 |
| Deuteranopia (no green cones) | #071D3D | 0.014 |
| Tritanopia (no blue cones) | #00282C | 0.048 |
| Achromatopsia (no color) | #202020 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00213E
#00213E
oklch(24.3% 0.067 249)
- #301A00
#301A00
oklch(24.2% 0.053 67.9)
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 #00213E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.038
- Rich Black #0D1B2A ΔE 0.040
- Dark #1B2431 ΔE 0.042
- Navy Blue #001146 ΔE 0.052
- Jet #212529 ΔE 0.061
- Marine #042E60 ΔE 0.072
- Space Cadet #2B2D42 ΔE 0.074
- Dark Indigo #1F0954 ΔE 0.079
Use #00213E 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.