#042229
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.037 216.3), rgb(4, 34, 41).
Aa
White text reads best on this color (16.58:1).
About this color
#042229 is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.037 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 16.58:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.58:1 |
Values
| HEX | #042229 |
| RGB | rgb(4, 34, 41) |
| HSL | hsl(191, 82%, 9%) |
| OKLCH | oklch(23.4% 0.037 216.3) |
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 #042229 | 16.58:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #042229 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #042229 text on white | 16.58:1 | AAA | Lc 103.4 | Preferred for body text |
| #042229 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE4
oklch(88.6% 0.025 215.9)
-
Step 300
300
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6BACBD
oklch(70.7% 0.071 216.3)
-
Step 500
500
#3C97AC
oklch(63.1% 0.09 215.7)
-
Step 600
600
#048198
oklch(55.6% 0.098 216.2)
-
Step 700
700
#006C80
oklch(49% 0.087 216.4)
-
Step 800
800
#015969
oklch(42.7% 0.075 215.5)
-
Step 900
900
#124956
oklch(37.7% 0.059 217.2)
-
Step 950
950 (this color)
#042229
oklch(23.4% 0.037 216.3)
#042229 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) | #1D2129 | 0.032 |
| Deuteranopia (no green cones) | #181D29 | 0.029 |
| Tritanopia (no blue cones) | #002424 | 0.015 |
| Achromatopsia (no color) | #1E1E1E | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042229
#042229
oklch(23.4% 0.037 216.3)
- #2D1711
#2D1711
oklch(23.4% 0.038 36.1)
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 #042229, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Dark #1B2431 ΔE 0.034
- Jet #212529 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.048
- Rich Navy #001219 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.081
- Dark Forest Green #002D04 ΔE 0.084
- Navy Blue #001146 ΔE 0.084
Use #042229 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.