#EF5333
Closest named color: Orangey Red (#FA4224). oklch(65% 0.198 33.4), rgb(239, 83, 51).
Aa
Black text reads best on this color (5.95:1).
About this color
#EF5333 is a medium-light, vivid red. In OKLCH its lightness is 65%, its chroma 0.198 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Orangey Red (#FA4224), ΔE 0.027 away. Black text reads best on it, at 5.95:1.
| Hue family | Reds |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.198) |
| Temperature | warm |
| Nearest name | Orangey Red (#FA4224) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #EF5333 |
| RGB | rgb(239, 83, 51) |
| HSL | hsl(10, 85%, 57%) |
| OKLCH | oklch(65% 0.198 33.4) |
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 #EF5333 | 3.52:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #EF5333 | 5.95:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #EF5333 text on white | 3.52:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #EF5333 text on black | 5.95:1 | AA | Lc -40.0 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FCE4DE
oklch(93.7% 0.028 34.3)
-
Step 200
200
#FACDC2
oklch(88.4% 0.053 34)
-
Step 300
300
#F8AA98
oklch(80.9% 0.096 33.5)
-
Step 400
400
#F1785E
oklch(70.7% 0.155 33.5)
-
Step 500
500 (this color)
#EF5333
oklch(65% 0.198 33.4)
-
Step 600
600
#CF2C00
oklch(55.6% 0.203 33.4)
-
Step 700
700
#AF2400
oklch(49.1% 0.179 33.5)
-
Step 800
800
#911C00
oklch(42.7% 0.156 33.4)
-
Step 900
900
#771C08
oklch(37.7% 0.128 33.5)
-
Step 950
950
#461208
oklch(26.9% 0.082 33)
#EF5333 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) | #80732E | 0.204 |
| Deuteranopia (no green cones) | #A7952C | 0.186 |
| Tritanopia (no blue cones) | #FF244D | 0.071 |
| Achromatopsia (no color) | #888888 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF5333
#EF5333
oklch(65% 0.198 33.4)
- #00A1B9
#00A1B9
oklch(65.1% 0.114 213.1)
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 #EF5333, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orangey Red #FA4224 ΔE 0.027
- Blood Orange #FE4B03 ΔE 0.032
- Orange Pant #FB5607 ΔE 0.032
- Orangered #FE420F ΔE 0.033
- Orange Red #FF4500 ΔE 0.034
- Red Orange #FD3C06 ΔE 0.036
- Vermillion #F4320C ΔE 0.042
- Bright Orange #FF5B00 ΔE 0.043
Use #EF5333 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.