#04171F
Closest named color: Rich Navy (#001219). oklch(19.3% 0.03 227.4), rgb(4, 23, 31).
Aa
White text reads best on this color (18.30:1).
About this color
#04171F is a very dark, muted teal or cyan. In OKLCH its lightness is 19%, its chroma 0.030 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.024 away. White text reads best on it, at 18.30:1.
| Hue family | Teals and cyans |
| Lightness | very dark (19%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.14:1 |
| White text | 18.30:1 |
Values
| HEX | #04171F |
| RGB | rgb(4, 23, 31) |
| HSL | hsl(198, 77%, 7%) |
| OKLCH | oklch(19.3% 0.03 227.4) |
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 #04171F | 18.30:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #04171F | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #04171F text on white | 18.30:1 | AAA | Lc 104.9 | Preferred for body text |
| #04171F text on black | 1.14:1 | 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
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D3
oklch(80.9% 0.036 226.7)
-
Step 400
400
#7AA8BD
oklch(70.6% 0.058 227.9)
-
Step 500
500
#5693AC
oklch(63.2% 0.074 226.4)
-
Step 600
600
#397D98
oklch(55.7% 0.08 227)
-
Step 700
700
#2B6982
oklch(49.2% 0.074 227.8)
-
Step 800
800
#255669
oklch(42.8% 0.061 226.4)
-
Step 900
900
#234756
oklch(37.8% 0.049 227.3)
-
Step 950
950 (this color)
#04171F
oklch(19.3% 0.03 227.4)
#04171F 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) | #13161F | 0.023 |
| Deuteranopia (no green cones) | #0F141F | 0.019 |
| Tritanopia (no blue cones) | #00191A | 0.016 |
| Achromatopsia (no color) | #151515 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04171F
#04171F
oklch(19.3% 0.03 227.4)
- #201008
#201008
oklch(19.4% 0.031 47.2)
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 #04171F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.024
- Rich Black #0D1B2A ΔE 0.029
- Almost Black #070D0D ΔE 0.046
- Dark #1B2431 ΔE 0.067
- Jet #212529 ΔE 0.073
- Oxford Blue #1B263B ΔE 0.080
- Dark Navy #000435 ΔE 0.080
- Navy Blue #001146 ΔE 0.081
Use #04171F 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.