#243133
Closest named color: Gunmetal (#293241). oklch(30.2% 0.018 207.9), rgb(36, 49, 51).
Aa
White text reads best on this color (13.44:1).
About this color
#243133 is a dark close to neutral grey. In OKLCH its lightness is 30%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.027 away. White text reads best on it, at 13.44:1.
| Hue family | Neutrals |
| Lightness | dark (30%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.56:1 |
| White text | 13.44:1 |
Values
| HEX | #243133 |
| RGB | rgb(36, 49, 51) |
| HSL | hsl(188, 17%, 17%) |
| OKLCH | oklch(30.2% 0.018 207.9) |
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 #243133 | 13.44:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #243133 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #243133 text on white | 13.44:1 | AAA | Lc 99.9 | Preferred for body text |
| #243133 text on black | 1.56:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B2C5C8
oklch(81% 0.021 208.1)
-
Step 400
400
#89A7AC
oklch(70.7% 0.034 208.8)
-
Step 500
500
#6B9197
oklch(63.1% 0.043 208.2)
-
Step 600
600
#527B82
oklch(55.5% 0.047 209.3)
-
Step 700
700
#42686E
oklch(49.1% 0.044 208.4)
-
Step 800
800
#375559
oklch(42.8% 0.036 206.4)
-
Step 900
900
#304649
oklch(37.7% 0.028 206.6)
-
Step 950
950 (this color)
#243133
oklch(30.2% 0.018 207.9)
#243133 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) | #2F3033 | 0.018 |
| Deuteranopia (no green cones) | #2C2E33 | 0.016 |
| Tritanopia (no blue cones) | #1F3232 | 0.008 |
| Achromatopsia (no color) | #2F2F2F | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243133
#243133
oklch(30.2% 0.018 207.9)
- #372B29
#372B29
oklch(30.2% 0.018 29.2)
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 #243133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.037
- Jet #212529 ΔE 0.042
- Onyx #343A40 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.049
- Dark #1B2431 ΔE 0.049
- Midnight Green #073B4C ΔE 0.050
Use #243133 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.