#28393F
Closest named color: Onyx (#343A40). oklch(33.2% 0.024 221.7), rgb(40, 57, 63).
Aa
White text reads best on this color (12.01:1).
About this color
#28393F is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.019 away. White text reads best on it, at 12.01:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.74:1 |
| White text | 12.01:1 |
Values
| HEX | #28393F |
| RGB | rgb(40, 57, 63) |
| HSL | hsl(196, 22%, 20%) |
| OKLCH | oklch(33.2% 0.024 221.7) |
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 #28393F | 12.01:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #28393F | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #28393F text on white | 12.01:1 | AAA | Lc 97.5 | Preferred for body text |
| #28393F text on black | 1.74:1 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDE
oklch(88.5% 0.011 219.6)
-
Step 300
300
#B4C4C9
oklch(81% 0.019 218.4)
-
Step 400
400
#8DA5AE
oklch(70.6% 0.03 222.5)
-
Step 500
500
#718F9A
oklch(63.1% 0.038 222.2)
-
Step 600
600
#597984
oklch(55.6% 0.04 221.1)
-
Step 700
700
#496670
oklch(49.1% 0.038 221.2)
-
Step 800
800
#3C535B
oklch(42.7% 0.031 221.3)
-
Step 900
900 (this color)
#28393F
oklch(33.2% 0.024 221.7)
-
Step 950
950
#1E282C
oklch(26.9% 0.016 224.2)
#28393F 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) | #35383F | 0.020 |
| Deuteranopia (no green cones) | #32353F | 0.019 |
| Tritanopia (no blue cones) | #203B3B | 0.015 |
| Achromatopsia (no color) | #363636 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28393F
#28393F
oklch(33.2% 0.024 221.7)
- #41322C
#41322C
oklch(33.2% 0.024 42.9)
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 #28393F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.025
- Gunmetal #293241 ΔE 0.025
- Midnight Green #073B4C ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.043
- Charcoal #264653 ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.050
Use #28393F 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.