#903511
Closest named color: Rust Brown (#8B3103). oklch(45.4% 0.132 39.5), rgb(144, 53, 17).
Aa
White text reads best on this color (7.76:1).
About this color
#903511 is a medium-dark, moderately saturated red. In OKLCH its lightness is 45%, its chroma 0.132 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Brown (#8B3103), ΔE 0.015 away. White text reads best on it, at 7.76:1.
| Hue family | Reds |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.132) |
| Temperature | warm |
| Nearest name | Rust Brown (#8B3103) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #903511 |
| RGB | rgb(144, 53, 17) |
| HSL | hsl(17, 79%, 32%) |
| OKLCH | oklch(45.4% 0.132 39.5) |
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 #903511 | 7.76:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #903511 | 2.70:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #903511 text on white | 7.76:1 | AAA | Lc 86.1 | Fine for body text |
| #903511 text on black | 2.70:1 | Fails | Lc -15.9 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F3D0C5
oklch(88.4% 0.042 38.2)
-
Step 300
300
#EDB09C
oklch(80.9% 0.077 38.9)
-
Step 400
400
#E18465
oklch(70.6% 0.123 39.1)
-
Step 500
500
#D66238
oklch(63.2% 0.157 39.7)
-
Step 600
600
#C1440C
oklch(55.5% 0.17 39.6)
-
Step 700
700
#A53600
oklch(49% 0.155 39.6)
-
Step 800
800 (this color)
#903511
oklch(45.4% 0.132 39.5)
-
Step 900
900
#6D2A11
oklch(37.8% 0.102 39.6)
-
Step 950
950
#40190C
oklch(26.9% 0.065 38.7)
#903511 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) | #4F460A | 0.131 |
| Deuteranopia (no green cones) | #665A0C | 0.118 |
| Tritanopia (no blue cones) | #9F1D2E | 0.059 |
| Achromatopsia (no color) | #525252 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #903511
#903511
oklch(45.4% 0.132 39.5)
- #006176
#006176
oklch(45.5% 0.083 219.4)
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 #903511, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Brown #8B3103 ΔE 0.015
- Brown Red #922B05 ΔE 0.017
- Red Brown #8B2E16 ΔE 0.020
- Saddle Brown #8B4513 ΔE 0.035
- Burnt Red #9F2305 ΔE 0.036
- Brick #A03623 ΔE 0.037
- Russet #A13905 ΔE 0.038
- Auburn #9B2226 ΔE 0.045
Use #903511 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.