#031819
Closest named color: Rich Navy (#001219). oklch(19.2% 0.028 199.2), rgb(3, 24, 25).
Aa
White text reads best on this color (18.28:1).
About this color
#031819 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 0.026 away. White text reads best on it, at 18.28:1.
| 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 | 18.28:1 |
Values
| HEX | #031819 |
| RGB | rgb(3, 24, 25) |
| HSL | hsl(183, 79%, 5%) |
| OKLCH | oklch(19.2% 0.028 199.2) |
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 #031819 | 18.28:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #031819 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #031819 text on white | 18.28:1 | AAA | Lc 104.8 | Preferred for body text |
| #031819 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#A9C8C9
oklch(81% 0.033 198.9)
-
Step 400
400
#79ABAD
oklch(70.7% 0.053 199.2)
-
Step 500
500
#539699
oklch(63% 0.068 199.3)
-
Step 600
600
#358084
oklch(55.5% 0.074 200.1)
-
Step 700
700
#266D70
oklch(49.2% 0.069 199.1)
-
Step 800
800
#22585B
oklch(42.6% 0.057 200.3)
-
Step 900
900
#22494B
oklch(37.8% 0.044 199.9)
-
Step 950
950 (this color)
#031819
oklch(19.2% 0.028 199.2)
#031819 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) | #161619 | 0.030 |
| Deuteranopia (no green cones) | #121419 | 0.026 |
| Tritanopia (no blue cones) | #001918 | 0.007 |
| Achromatopsia (no color) | #151515 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031819
#031819
oklch(19.2% 0.028 199.2)
- #1F0F0F
#1F0F0F
oklch(19.2% 0.027 19.9)
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 #031819, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.039
- Almost Black #070D0D ΔE 0.044
- Dark #1B2431 ΔE 0.071
- Jet #212529 ΔE 0.074
- Oxford Blue #1B263B ΔE 0.087
- Very Dark Brown #1D0200 ΔE 0.091
- Dark Navy #000435 ΔE 0.093
Use #031819 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.