#B1003D
Closest named color: Rouge (#AB1239). oklch(48.4% 0.193 13.6), rgb(177, 0, 61).
Aa
White text reads best on this color (7.15:1).
About this color
#B1003D is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.193 and its hue 14°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.015 away. White text reads best on it, at 7.15:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.193) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #B1003D |
| RGB | rgb(177, 0, 61) |
| HSL | hsl(339, 100%, 35%) |
| OKLCH | oklch(48.4% 0.193 13.6) |
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 #B1003D | 7.15:1 | AAA | Lc -87.3 | Fine for body text |
| Black text on #B1003D | 2.93:1 | Fails | Lc 21.8 | Dividers and decoration only |
| #B1003D text on white | 7.15:1 | AAA | Lc 82.2 | Fine for body text |
| #B1003D text on black | 2.93:1 | Fails | Lc -19.7 | 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 700.
-
Step 50
50
#FEF2F3
oklch(97.1% 0.013 11.5)
-
Step 100
100
#FCE3E4
oklch(93.6% 0.028 14.9)
-
Step 200
200
#FACCCF
oklch(88.6% 0.052 13.8)
-
Step 300
300
#F7A8AF
oklch(81% 0.094 13.5)
-
Step 400
400
#EE7585
oklch(70.7% 0.149 13.4)
-
Step 500
500
#E54966
oklch(63.1% 0.192 13.8)
-
Step 600
600
#D01D4E
oklch(55.6% 0.208 13.5)
-
Step 700
700 (this color)
#B1003D
oklch(48.4% 0.193 13.6)
-
Step 800
800
#921034
oklch(42.7% 0.161 13.6)
-
Step 900
900
#751A2D
oklch(37.7% 0.124 13.9)
-
Step 950
950
#45111B
oklch(26.9% 0.08 12.9)
#B1003D 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) | #44423D | 0.218 |
| Deuteranopia (no green cones) | #6C6338 | 0.198 |
| Tritanopia (no blue cones) | #C30022 | 0.051 |
| Achromatopsia (no color) | #585858 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1003D
#B1003D
oklch(48.4% 0.193 13.6)
- #006D6C
#006D6C
oklch(48.4% 0.083 193.7)
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 #B1003D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.015
- Raspberry #B00149 ΔE 0.018
- Rose Red #BE013C ΔE 0.028
- Lipstick Red #C0022F ΔE 0.038
- Cranberry #9E003A ΔE 0.041
- Firebrick #B22222 ΔE 0.047
- Violet Red #A50055 ΔE 0.047
- Scarlet #BE0119 ΔE 0.049
Use #B1003D 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.