#AD2727
Closest named color: Firebrick (#B22222). oklch(49.2% 0.171 26.2), rgb(173, 39, 39).
Aa
White text reads best on this color (6.78:1).
About this color
#AD2727 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.171 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.010 away. White text reads best on it, at 6.78:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #AD2727 |
| RGB | rgb(173, 39, 39) |
| HSL | hsl(0, 63%, 42%) |
| OKLCH | oklch(49.2% 0.171 26.2) |
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 #AD2727 | 6.78:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #AD2727 | 3.09:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #AD2727 text on white | 6.78:1 | AA | Lc 81.9 | Fine for body text |
| #AD2727 text on black | 3.09:1 | AA large text | Lc -19.9 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F6CEC9
oklch(88.4% 0.046 26.4)
-
Step 300
300
#F1ACA5
oklch(80.8% 0.082 25.5)
-
Step 400
400
#E77E74
oklch(70.7% 0.131 26.6)
-
Step 500
500
#DD5750
oklch(63.1% 0.169 26.1)
-
Step 600
600
#C83634
oklch(55.5% 0.183 26.1)
-
Step 700
700 (this color)
#AD2727
oklch(49.2% 0.171 26.2)
-
Step 800
800
#8C2321
oklch(42.7% 0.141 26.4)
-
Step 900
900
#712320
oklch(37.7% 0.111 26.1)
-
Step 950
950
#421613
oklch(26.9% 0.069 26.6)
#AD2727 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) | #504925 | 0.185 |
| Deuteranopia (no green cones) | #716621 | 0.170 |
| Tritanopia (no blue cones) | #BF0029 | 0.040 |
| Achromatopsia (no color) | #5B5B5B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD2727
#AD2727
oklch(49.2% 0.171 26.2)
- #006E79
#006E79
oklch(49.2% 0.084 206.9)
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 #AD2727, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.010
- Brown #A52A2A ΔE 0.016
- Rufous #AE2012 ΔE 0.016
- Rust Red #AA2704 ΔE 0.024
- Rusty Red #AF2F0D ΔE 0.026
- Brick #A03623 ΔE 0.032
- Scarlet #BE0119 ΔE 0.036
- Rouge #AB1239 ΔE 0.037
Use #AD2727 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.