#B73542
Closest named color: Dull Red (#BB3F3F). oklch(52.7% 0.166 19.5), rgb(183, 53, 66).
Aa
White text reads best on this color (5.83:1).
About this color
#B73542 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.166 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.022 away. White text reads best on it, at 5.83:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.166) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.60:1 |
| White text | 5.83:1 |
Values
| HEX | #B73542 |
| RGB | rgb(183, 53, 66) |
| HSL | hsl(354, 55%, 46%) |
| OKLCH | oklch(52.7% 0.166 19.5) |
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 #B73542 | 5.83:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #B73542 | 3.60:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #B73542 text on white | 5.83:1 | AA | Lc 78.0 | Fine for body text |
| #B73542 text on black | 3.60:1 | AA large text | Lc -23.7 | 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 600.
-
Step 50
50
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F8E5E4
oklch(93.7% 0.021 21.2)
-
Step 200
200
#F4CFCE
oklch(88.6% 0.042 19.8)
-
Step 300
300
#EDAEAD
oklch(80.9% 0.074 19.9)
-
Step 400
400
#E18182
oklch(70.7% 0.119 19.8)
-
Step 500
500
#D65D63
oklch(63.1% 0.153 19.5)
-
Step 600
600 (this color)
#B73542
oklch(52.7% 0.166 19.5)
-
Step 700
700
#A62F3B
oklch(49% 0.154 19.5)
-
Step 800
800
#872931
oklch(42.7% 0.128 19.6)
-
Step 900
900
#6D272B
oklch(37.8% 0.1 19.9)
-
Step 950
950
#40181A
oklch(27.1% 0.063 19.2)
#B73542 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) | #585442 | 0.182 |
| Deuteranopia (no green cones) | #796F3E | 0.167 |
| Tritanopia (no blue cones) | #C90D3B | 0.044 |
| Achromatopsia (no color) | #656565 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73542
#B73542
oklch(52.7% 0.166 19.5)
- #007A7F
#007A7F
oklch(52.7% 0.09 199.8)
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 #B73542, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Dusty Red #B9484E ΔE 0.034
- Firebrick #B22222 ΔE 0.040
- Dark Rose #B5485D ΔE 0.041
- Lipstick Red #C0022F ΔE 0.042
- Light Burgundy #A8415B ΔE 0.043
- Rose Red #BE013C ΔE 0.043
- Scarlet #BE0119 ΔE 0.050
Use #B73542 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.