#04213A
Closest named color: Rich Black (#0D1B2A). oklch(24.2% 0.059 248.4), rgb(4, 33, 58).
Aa
White text reads best on this color (16.35:1).
About this color
#04213A is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.059 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.034 away. White text reads best on it, at 16.35:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.28:1 |
| White text | 16.35:1 |
Values
| HEX | #04213A |
| RGB | rgb(4, 33, 58) |
| HSL | hsl(208, 87%, 12%) |
| OKLCH | oklch(24.2% 0.059 248.4) |
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 #04213A | 16.35:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #04213A | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #04213A text on white | 16.35:1 | AAA | Lc 103.1 | Preferred for body text |
| #04213A 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9EC5EC
oklch(80.9% 0.069 248.7)
-
Step 400
400
#66A6E3
oklch(70.7% 0.112 248.6)
-
Step 500
500
#358EDB
oklch(63.1% 0.143 248.5)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#0D4470
oklch(37.7% 0.093 248.2)
-
Step 950
950 (this color)
#04213A
oklch(24.2% 0.059 248.4)
#04213A 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) | #15223B | 0.020 |
| Deuteranopia (no green cones) | #0D1D3A | 0.015 |
| Tritanopia (no blue cones) | #00272A | 0.043 |
| Achromatopsia (no color) | #202020 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04213A
#04213A
oklch(24.2% 0.059 248.4)
- #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 #04213A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.034
- Oxford Blue #1B263B ΔE 0.034
- Dark #1B2431 ΔE 0.036
- Jet #212529 ΔE 0.053
- Navy Blue #001146 ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.071
- Marine #042E60 ΔE 0.077
- Gunmetal #293241 ΔE 0.080
Use #04213A 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.