#04171C
Closest named color: Rich Navy (#001219). oklch(19.1% 0.028 216.7), rgb(4, 23, 28).
Aa
White text reads best on this color (18.34:1).
About this color
#04171C is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.022 away. White text reads best on it, at 18.34:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.14:1 |
| White text | 18.34:1 |
Values
| HEX | #04171C |
| RGB | rgb(4, 23, 28) |
| HSL | hsl(193, 75%, 6%) |
| OKLCH | oklch(19.1% 0.028 216.7) |
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 #04171C | 18.34:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #04171C | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #04171C text on white | 18.34:1 | AAA | Lc 104.9 | Preferred for body text |
| #04171C 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDCE1
oklch(88.4% 0.019 218.4)
-
Step 300
300
#AAC6CE
oklch(80.8% 0.032 216.9)
-
Step 400
400
#7BA9B6
oklch(70.6% 0.053 217.1)
-
Step 500
500
#5894A4
oklch(63.2% 0.067 216.8)
-
Step 600
600
#3A7E8F
oklch(55.6% 0.073 216.5)
-
Step 700
700
#2C6A7A
oklch(49.1% 0.068 217.5)
-
Step 800
800
#265763
oklch(42.8% 0.056 216.1)
-
Step 900
900
#244751
oklch(37.6% 0.044 218.5)
-
Step 950
950 (this color)
#04171C
oklch(19.1% 0.028 216.7)
#04171C 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) | #14161C | 0.025 |
| Deuteranopia (no green cones) | #10131C | 0.023 |
| Tritanopia (no blue cones) | #001919 | 0.013 |
| Achromatopsia (no color) | #141414 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04171C
#04171C
oklch(19.1% 0.028 216.7)
- #1F0F0B
#1F0F0B
oklch(19% 0.029 34.8)
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 #04171C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.022
- Rich Black #0D1B2A ΔE 0.034
- Almost Black #070D0D ΔE 0.043
- Dark #1B2431 ΔE 0.070
- Jet #212529 ΔE 0.074
- Oxford Blue #1B263B ΔE 0.084
- Dark Navy #000435 ΔE 0.085
- Navy Blue #001146 ΔE 0.087
Use #04171C 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.