#243A36
Closest named color: Onyx (#343A40). oklch(32.9% 0.029 181.8), rgb(36, 58, 54).
Aa
White text reads best on this color (12.11:1).
About this color
#243A36 is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.031 away. White text reads best on it, at 12.11:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.73:1 |
| White text | 12.11:1 |
Values
| HEX | #243A36 |
| RGB | rgb(36, 58, 54) |
| HSL | hsl(169, 23%, 18%) |
| OKLCH | oklch(32.9% 0.029 181.8) |
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 #243A36 | 12.11:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #243A36 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #243A36 text on white | 12.11:1 | AAA | Lc 97.7 | Preferred for body text |
| #243A36 text on black | 1.73:1 | 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 900.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D1DCD9
oklch(88.5% 0.013 178)
-
Step 300
300
#B2C5C1
oklch(80.8% 0.021 181.7)
-
Step 400
400
#8AA8A2
oklch(70.7% 0.034 181.8)
-
Step 500
500
#6C938B
oklch(63.2% 0.045 180.7)
-
Step 600
600
#537D75
oklch(55.6% 0.048 181.2)
-
Step 700
700
#436962
oklch(49% 0.045 181.5)
-
Step 800
800
#385650
oklch(42.8% 0.037 180.5)
-
Step 900
900 (this color)
#243A36
oklch(32.9% 0.029 181.8)
-
Step 950
950
#1D2927
oklch(26.9% 0.017 183.7)
#243A36 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) | #383836 | 0.030 |
| Deuteranopia (no green cones) | #343536 | 0.028 |
| Tritanopia (no blue cones) | #1D3B39 | 0.009 |
| Achromatopsia (no color) | #363636 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243A36
#243A36
oklch(32.9% 0.029 181.8)
- #422F34
#422F34
oklch(32.9% 0.029 1.4)
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 #243A36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.031
- Gunmetal #293241 ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.040
- Midnight Green #073B4C ΔE 0.043
- Pakistan Green #283618 ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.048
- Charcoal #264653 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.056
Use #243A36 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.