#B1433A
Closest named color: Dull Red (#BB3F3F). oklch(53.2% 0.145 27.7), rgb(177, 67, 58).
Aa
White text reads best on this color (5.62:1).
About this color
#B1433A is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.145 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.021 away. White text reads best on it, at 5.62:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.145) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #B1433A |
| RGB | rgb(177, 67, 58) |
| HSL | hsl(5, 51%, 46%) |
| OKLCH | oklch(53.2% 0.145 27.7) |
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 #B1433A | 5.62:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #B1433A | 3.73:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #B1433A text on white | 5.62:1 | AA | Lc 77.3 | Fine for body text |
| #B1433A text on black | 3.73:1 | AA large text | Lc -24.4 | 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 600.
-
Step 50
50
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F6E5E3
oklch(93.5% 0.019 25.6)
-
Step 200
200
#F0D1CC
oklch(88.5% 0.036 28.7)
-
Step 300
300
#E8B1A9
oklch(80.9% 0.066 28)
-
Step 400
400
#DA877C
oklch(70.7% 0.104 28.1)
-
Step 500
500
#CE665B
oklch(63.1% 0.134 27.7)
-
Step 600
600 (this color)
#B1433A
oklch(53.2% 0.145 27.7)
-
Step 700
700
#9F3B33
oklch(49.1% 0.135 27.6)
-
Step 800
800
#81312B
oklch(42.6% 0.112 27.1)
-
Step 900
900
#682C27
oklch(37.6% 0.087 26.9)
-
Step 950
950
#3D1B17
oklch(27% 0.054 28.1)
#B1433A 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) | #605838 | 0.153 |
| Deuteranopia (no green cones) | #7C7037 | 0.140 |
| Tritanopia (no blue cones) | #C22B42 | 0.049 |
| Achromatopsia (no color) | #676767 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1433A
#B1433A
oklch(53.2% 0.145 27.7)
- #007B88
#007B88
oklch(53.3% 0.092 207.7)
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 #B1433A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.021
- Dusty Red #B9484E ΔE 0.030
- Sinopia #BB3E03 ΔE 0.040
- Rusty Red #AF2F0D ΔE 0.044
- Light Maroon #A24857 ΔE 0.046
- Dark Rose #B5485D ΔE 0.046
- Sienna #A0522D ΔE 0.049
- Firebrick #B22222 ΔE 0.049
Use #B1433A 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.