#903133
Closest named color: Auburn (#9B2226). oklch(45.3% 0.129 22.6), rgb(144, 49, 51).
Aa
White text reads best on this color (7.85:1).
About this color
#903133 is a medium-dark, moderately saturated red. In OKLCH its lightness is 45%, its chroma 0.129 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Auburn (#9B2226), ΔE 0.029 away. White text reads best on it, at 7.85:1.
| Hue family | Reds |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.129) |
| Temperature | warm |
| Nearest name | Auburn (#9B2226) |
| Black text | 2.67:1 |
| White text | 7.85:1 |
Values
| HEX | #903133 |
| RGB | rgb(144, 49, 51) |
| HSL | hsl(359, 49%, 38%) |
| OKLCH | oklch(45.3% 0.129 22.6) |
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 #903133 | 7.85:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #903133 | 2.67:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #903133 text on white | 7.85:1 | AAA | Lc 86.4 | Fine for body text |
| #903133 text on black | 2.67:1 | Fails | Lc -15.6 | Dividers and decoration only |
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 800.
-
Step 50
50
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E3
oklch(93.7% 0.021 24.8)
-
Step 200
200
#F4CFCC
oklch(88.5% 0.042 23.5)
-
Step 300
300
#EEAEAA
oklch(80.9% 0.076 22.9)
-
Step 400
400
#E2817D
oklch(70.8% 0.12 23.1)
-
Step 500
500
#D65D5D
oklch(63% 0.153 22.5)
-
Step 600
600
#C23F43
oklch(55.7% 0.167 22.7)
-
Step 700
700
#A72F35
oklch(49.1% 0.156 22.4)
-
Step 800
800 (this color)
#903133
oklch(45.3% 0.129 22.6)
-
Step 900
900
#6D2728
oklch(37.7% 0.1 22.4)
-
Step 950
950
#401818
oklch(27% 0.063 22.2)
#903133 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) | #4A4532 | 0.138 |
| Deuteranopia (no green cones) | #625930 | 0.127 |
| Tritanopia (no blue cones) | #9E1C33 | 0.037 |
| Achromatopsia (no color) | #525252 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #903133
#903133
oklch(45.3% 0.129 22.6)
- #006269
#006269
oklch(45.2% 0.077 203.3)
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 #903133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Auburn #9B2226 ΔE 0.029
- Red Brown #8B2E16 ΔE 0.033
- Brown Red #922B05 ΔE 0.039
- Brick #A03623 ΔE 0.042
- Brown #A52A2A ΔE 0.042
- Rust Brown #8B3103 ΔE 0.045
- Burnt Red #9F2305 ΔE 0.045
- Carmine #9D0216 ΔE 0.051
Use #903133 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.