#183131
Closest named color: Gunmetal (#293241). oklch(29.3% 0.031 195.6), rgb(24, 49, 49).
Aa
White text reads best on this color (13.79:1).
About this color
#183131 is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.031 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.040 away. White text reads best on it, at 13.79:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.52:1 |
| White text | 13.79:1 |
Values
| HEX | #183131 |
| RGB | rgb(24, 49, 49) |
| HSL | hsl(180, 34%, 14%) |
| OKLCH | oklch(29.3% 0.031 195.6) |
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 #183131 | 13.79:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #183131 | 1.52:1 | Fails | Lc 0.0 | Not readable |
| #183131 text on white | 13.79:1 | AAA | Lc 100.3 | Preferred for body text |
| #183131 text on black | 1.52:1 | 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
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDD
oklch(88.5% 0.021 193.1)
-
Step 300
300
#A6C8C8
oklch(80.8% 0.036 196.5)
-
Step 400
400
#74ACAC
oklch(70.6% 0.059 195.9)
-
Step 500
500
#4C9898
oklch(63.2% 0.075 195.4)
-
Step 600
600
#298283
oklch(55.6% 0.082 196.1)
-
Step 700
700
#1A6E6E
oklch(49.1% 0.076 195)
-
Step 800
800
#195A5A
oklch(42.8% 0.063 195)
-
Step 900
900
#1D4A4A
oklch(37.8% 0.049 195.3)
-
Step 950
950 (this color)
#183131
oklch(29.3% 0.031 195.6)
#183131 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) | #2E2F31 | 0.032 |
| Deuteranopia (no green cones) | #2A2C31 | 0.030 |
| Tritanopia (no blue cones) | #0C3231 | 0.011 |
| Achromatopsia (no color) | #2D2D2D | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183131
#183131
oklch(29.3% 0.031 195.6)
- #3A2627
#3A2627
oklch(29.3% 0.03 15.8)
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 #183131, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.040
- Jet #212529 ΔE 0.041
- Dark #1B2431 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.048
- Midnight Green #073B4C ΔE 0.051
- Pakistan Green #283618 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.056
Use #183131 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.