#04222F
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.043 230.7), rgb(4, 34, 47).
Aa
White text reads best on this color (16.47:1).
About this color
#04222F is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.043 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 16.47:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.47:1 |
Values
| HEX | #04222F |
| RGB | rgb(4, 34, 47) |
| HSL | hsl(198, 84%, 10%) |
| OKLCH | oklch(23.7% 0.043 230.7) |
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 #04222F | 16.47:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #04222F | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #04222F text on white | 16.47:1 | AAA | Lc 103.2 | Preferred for body text |
| #04222F 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#A0C7DC
oklch(80.8% 0.051 231.7)
-
Step 400
400
#69AACA
oklch(70.7% 0.081 230.8)
-
Step 500
500
#3994BC
oklch(63% 0.104 230.7)
-
Step 600
600
#007EA8
oklch(55.6% 0.112 230.6)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#10485F
oklch(37.8% 0.068 230.5)
-
Step 950
950 (this color)
#04222F
oklch(23.7% 0.043 230.7)
#04222F 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) | #1B2130 | 0.029 |
| Deuteranopia (no green cones) | #151D2F | 0.025 |
| Tritanopia (no blue cones) | #002626 | 0.027 |
| Achromatopsia (no color) | #1F1F1F | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04222F
#04222F
oklch(23.7% 0.043 230.7)
- #2F180B
#2F180B
oklch(23.8% 0.043 49.1)
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 #04222F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Dark #1B2431 ΔE 0.030
- Oxford Blue #1B263B ΔE 0.040
- Jet #212529 ΔE 0.042
- Rich Navy #001219 ΔE 0.069
- Navy Blue #001146 ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.076
- Gunmetal #293241 ΔE 0.081
Use #04222F 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.