#B4003F
Closest named color: Raspberry (#B00149). oklch(49% 0.196 13.2), rgb(180, 0, 63).
Aa
White text reads best on this color (6.97:1).
About this color
#B4003F is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.196 and its hue 13°. Its hue sits on the warm side of the wheel. The nearest named color is Raspberry (#B00149), ΔE 0.017 away. White text reads best on it, at 6.97:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Raspberry (#B00149) |
| Black text | 3.01:1 |
| White text | 6.97:1 |
Values
| HEX | #B4003F |
| RGB | rgb(180, 0, 63) |
| HSL | hsl(339, 100%, 35%) |
| OKLCH | oklch(49% 0.196 13.2) |
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 #B4003F | 6.97:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #B4003F | 3.01:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #B4003F text on white | 6.97:1 | AA | Lc 81.6 | Fine for body text |
| #B4003F text on black | 3.01:1 | AA large text | Lc -20.3 | 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
#F7A7AF
oklch(80.8% 0.095 12.8)
-
Step 400
400
#EF7485
oklch(70.7% 0.152 13.2)
-
Step 500
500
#E64867
oklch(63.2% 0.194 13.3)
-
Step 600
600
#D1194E
oklch(55.6% 0.211 13.3)
-
Step 700
700 (this color)
#B4003F
oklch(49% 0.196 13.2)
-
Step 800
800
#920E34
oklch(42.6% 0.162 13.3)
-
Step 900
900
#76192E
oklch(37.8% 0.127 13.1)
-
Step 950
950
#45111B
oklch(26.9% 0.08 12.9)
#B4003F 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) | #454440 | 0.221 |
| Deuteranopia (no green cones) | #6E653A | 0.200 |
| Tritanopia (no blue cones) | #C60024 | 0.051 |
| Achromatopsia (no color) | #595959 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4003F
#B4003F
oklch(49% 0.196 13.2)
- #006F6E
#006F6E
oklch(49% 0.084 193.7)
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 #B4003F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Raspberry #B00149 ΔE 0.017
- Rouge #AB1239 ΔE 0.021
- Rose Red #BE013C ΔE 0.022
- Lipstick Red #C0022F ΔE 0.034
- Ruby #CA0147 ΔE 0.047
- Scarlet #BE0119 ΔE 0.048
- Firebrick #B22222 ΔE 0.048
- Cranberry #9E003A ΔE 0.048
Use #B4003F 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.