#503B40
Closest named color: Charcoal Grey (#3C4142). oklch(37.7% 0.031 2.8), rgb(80, 59, 64).
Aa
White text reads best on this color (10.29:1).
About this color
#503B40 is a dark, muted red. In OKLCH its lightness is 38%, its chroma 0.031 and its hue 3°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.037 away. White text reads best on it, at 10.29:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | muted (0.031) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.04:1 |
| White text | 10.29:1 |
Values
| HEX | #503B40 |
| RGB | rgb(80, 59, 64) |
| HSL | hsl(346, 15%, 27%) |
| OKLCH | oklch(37.7% 0.031 2.8) |
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 #503B40 | 10.29:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #503B40 | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #503B40 text on white | 10.29:1 | AAA | Lc 93.9 | Preferred for body text |
| #503B40 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#F7F5F5
oklch(97.2% 0.002 17.2)
-
Step 100
100
#EEE8E9
oklch(93.6% 0.007 5.6)
-
Step 200
200
#E1D6D8
oklch(88.5% 0.012 4.8)
-
Step 300
300
#CEBBBF
oklch(80.9% 0.022 3.2)
-
Step 400
400
#B5989E
oklch(70.8% 0.035 4.1)
-
Step 500
500
#A37E87
oklch(63.1% 0.047 2.3)
-
Step 600
600
#8D6770
oklch(55.5% 0.05 3.2)
-
Step 700
700
#78565E
oklch(49.2% 0.046 3.4)
-
Step 800
800
#62464D
oklch(42.7% 0.04 2.4)
-
Step 900
900 (this color)
#503B40
oklch(37.7% 0.031 2.8)
-
Step 950
950
#2F2325
oklch(27.1% 0.019 7.2)
#503B40 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) | #3E3E40 | 0.033 |
| Deuteranopia (no green cones) | #434240 | 0.030 |
| Tritanopia (no blue cones) | #543A3D | 0.008 |
| Achromatopsia (no color) | #404040 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #503B40
#503B40
oklch(37.7% 0.031 2.8)
- #2F4743
#2F4743
oklch(37.7% 0.03 183.1)
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 #503B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.037
- Purple Brown #673A3F ΔE 0.044
- Onyx #343A40 ΔE 0.050
- Charcoal #264653 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.071
- Dark Slate Gray #2F4F4F ΔE 0.073
- Gunmetal #293241 ΔE 0.078
- Dark Blue Grey #1F3B4D ΔE 0.079
Use #503B40 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.