#AD333B
Closest named color: Brown (#A52A2A). oklch(50.7% 0.158 21.3), rgb(173, 51, 59).
Aa
White text reads best on this color (6.33:1).
About this color
#AD333B is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.158 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.029 away. White text reads best on it, at 6.33:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #AD333B |
| RGB | rgb(173, 51, 59) |
| HSL | hsl(356, 54%, 44%) |
| OKLCH | oklch(50.7% 0.158 21.3) |
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 #AD333B | 6.33:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #AD333B | 3.31:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #AD333B text on white | 6.33:1 | AA | Lc 80.4 | Fine for body text |
| #AD333B text on black | 3.31:1 | AA large text | Lc -21.4 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E4E3
oklch(93.5% 0.022 21)
-
Step 200
200
#F4CFCD
oklch(88.5% 0.042 21.6)
-
Step 300
300
#EEAEAB
oklch(81% 0.076 21.9)
-
Step 400
400
#E3807F
oklch(70.8% 0.123 21.2)
-
Step 500
500
#D75C5F
oklch(63.1% 0.155 21.2)
-
Step 600
600
#C33D45
oklch(55.6% 0.17 21.4)
-
Step 700
700 (this color)
#AD333B
oklch(50.7% 0.158 21.3)
-
Step 800
800
#88282E
oklch(42.7% 0.13 21.2)
-
Step 900
900
#6E2629
oklch(37.7% 0.102 21)
-
Step 950
950
#411718
oklch(27% 0.066 21.1)
#AD333B 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) | #544F3A | 0.172 |
| Deuteranopia (no green cones) | #736937 | 0.158 |
| Tritanopia (no blue cones) | #BE0E37 | 0.043 |
| Achromatopsia (no color) | #5F5F5F | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AD333B
#AD333B
oklch(50.7% 0.158 21.3)
- #00737A
#00737A
oklch(50.6% 0.086 202.2)
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 #AD333B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.029
- Firebrick #B22222 ΔE 0.029
- Dull Red #BB3F3F ΔE 0.039
- Rufous #AE2012 ΔE 0.039
- Brick #A03623 ΔE 0.039
- Rusty Red #AF2F0D ΔE 0.040
- Rouge #AB1239 ΔE 0.041
- Light Burgundy #A8415B ΔE 0.044
Use #AD333B 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.