#B31D49
Closest named color: Raspberry (#B00149). oklch(50.2% 0.183 11.1), rgb(179, 29, 73).
Aa
White text reads best on this color (6.58:1).
About this color
#B31D49 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.183 and its hue 11°. Its hue sits on the warm side of the wheel. The nearest named color is Raspberry (#B00149), ΔE 0.022 away. White text reads best on it, at 6.58:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.183) |
| Temperature | warm |
| Nearest name | Raspberry (#B00149) |
| Black text | 3.18:1 |
| White text | 6.58:1 |
Values
| HEX | #B31D49 |
| RGB | rgb(179, 29, 73) |
| HSL | hsl(342, 72%, 41%) |
| OKLCH | oklch(50.2% 0.183 11.1) |
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 #B31D49 | 6.58:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #B31D49 | 3.18:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #B31D49 text on white | 6.58:1 | AA | Lc 80.9 | Fine for body text |
| #B31D49 text on black | 3.18:1 | AA large text | Lc -21.0 | 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
#FDF2F3
oklch(97% 0.012 11)
-
Step 100
100
#FAE3E5
oklch(93.5% 0.025 11.6)
-
Step 200
200
#F8CCD1
oklch(88.4% 0.05 10.5)
-
Step 300
300
#F4A9B2
oklch(80.9% 0.089 11.3)
-
Step 400
400
#EA788A
oklch(70.7% 0.141 11.4)
-
Step 500
500
#E04E6E
oklch(63.1% 0.182 10.9)
-
Step 600
600
#CB2956
oklch(55.6% 0.196 11.1)
-
Step 700
700 (this color)
#B31D49
oklch(50.2% 0.183 11.1)
-
Step 800
800
#8E193A
oklch(42.7% 0.151 10.9)
-
Step 900
900
#721E32
oklch(37.7% 0.117 10.8)
-
Step 950
950
#43131D
oklch(26.9% 0.074 11)
#B31D49 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) | #4A4A4A | 0.205 |
| Deuteranopia (no green cones) | #706845 | 0.187 |
| Tritanopia (no blue cones) | #C40031 | 0.043 |
| Achromatopsia (no color) | #5D5D5D | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B31D49
#B31D49
oklch(50.2% 0.183 11.1)
- #007370
#007370
oklch(50.2% 0.086 191.6)
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 #B31D49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Raspberry #B00149 ΔE 0.022
- Rose Red #BE013C ΔE 0.027
- Rouge #AB1239 ΔE 0.028
- Lipstick Red #C0022F ΔE 0.040
- Ruby #CA0147 ΔE 0.045
- Violet Red #A50055 ΔE 0.050
- Firebrick #B22222 ΔE 0.050
- Light Burgundy #A8415B ΔE 0.051
Use #B31D49 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.