#04181F
Closest named color: Rich Navy (#001219). oklch(19.6% 0.03 223.1), rgb(4, 24, 31).
Aa
White text reads best on this color (18.17:1).
About this color
#04181F is a very dark, muted teal or cyan. In OKLCH its lightness is 20%, its chroma 0.030 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.027 away. White text reads best on it, at 18.17:1.
| Hue family | Teals and cyans |
| Lightness | very dark (20%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.15:1 |
| White text | 18.17:1 |
Values
| HEX | #04181F |
| RGB | rgb(4, 24, 31) |
| HSL | hsl(196, 77%, 7%) |
| OKLCH | oklch(19.6% 0.03 223.1) |
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 #04181F | 18.17:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #04181F | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #04181F text on white | 18.17:1 | AAA | Lc 104.8 | Preferred for body text |
| #04181F text on black | 1.15:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#A9C6D2
oklch(80.9% 0.036 224.7)
-
Step 400
400
#79A9BB
oklch(70.7% 0.057 223.2)
-
Step 500
500
#5593AA
oklch(63% 0.073 224)
-
Step 600
600
#367D95
oklch(55.5% 0.079 223.3)
-
Step 700
700
#286A7F
oklch(49.2% 0.074 222.5)
-
Step 800
800
#235667
oklch(42.6% 0.061 223)
-
Step 900
900
#224754
oklch(37.6% 0.048 223.3)
-
Step 950
950 (this color)
#04181F
oklch(19.6% 0.03 223.1)
#04181F 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) | #14171F | 0.024 |
| Deuteranopia (no green cones) | #10141F | 0.022 |
| Tritanopia (no blue cones) | #001A1A | 0.016 |
| Achromatopsia (no color) | #161616 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04181F
#04181F
oklch(19.6% 0.03 223.1)
- #21100A
#21100A
oklch(19.6% 0.031 40.1)
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 #04181F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.027
- Rich Black #0D1B2A ΔE 0.028
- Almost Black #070D0D ΔE 0.049
- Dark #1B2431 ΔE 0.064
- Jet #212529 ΔE 0.070
- Oxford Blue #1B263B ΔE 0.078
- Navy Blue #001146 ΔE 0.083
- Dark Navy #000435 ΔE 0.084
Use #04181F 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.