#283240
Closest named color: Gunmetal (#293241). oklch(31.4% 0.029 256.8), rgb(40, 50, 64).
Aa
White text reads best on this color (12.95:1).
About this color
#283240 is a dark close to neutral grey. In OKLCH its lightness is 31%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.003 away. White text reads best on it, at 12.95:1.
| Hue family | Neutrals |
| Lightness | dark (31%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.62:1 |
| White text | 12.95:1 |
Values
| HEX | #283240 |
| RGB | rgb(40, 50, 64) |
| HSL | hsl(215, 23%, 20%) |
| OKLCH | oklch(31.4% 0.029 256.8) |
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 #283240 | 12.95:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #283240 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #283240 text on white | 12.95:1 | AAA | Lc 99.2 | Preferred for body text |
| #283240 text on black | 1.62:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B3C2D7
oklch(80.9% 0.034 256.8)
-
Step 400
400
#8BA2C3
oklch(70.6% 0.055 257.4)
-
Step 500
500
#6E8BB4
oklch(63% 0.07 257.1)
-
Step 600
600
#56759F
oklch(55.6% 0.075 256.2)
-
Step 700
700
#466288
oklch(49.1% 0.07 256.2)
-
Step 800
800
#3A506F
oklch(42.7% 0.059 257)
-
Step 900
900
#32425A
oklch(37.6% 0.046 258.3)
-
Step 950
950 (this color)
#283240
oklch(31.4% 0.029 256.8)
#283240 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) | #2D3341 | 0.009 |
| Deuteranopia (no green cones) | #2A3040 | 0.007 |
| Tritanopia (no blue cones) | #213537 | 0.025 |
| Achromatopsia (no color) | #313131 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283240
#283240
oklch(31.4% 0.029 256.8)
- #3A3021
#3A3021
oklch(31.6% 0.029 77.5)
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 #283240, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.003
- Space Cadet #2B2D42 ΔE 0.018
- Dark Blue Grey #1F3B4D ΔE 0.033
- Onyx #343A40 ΔE 0.035
- Midnight Green #073B4C ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.047
- Jet #212529 ΔE 0.055
Use #283240 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.