#EF664F
Closest named color: Burnt Sienna (#E76F51). oklch(67.7% 0.174 31.6), rgb(239, 102, 79).
Aa
Black text reads best on this color (6.68:1).
About this color
#EF664F is a medium-light, vivid red. In OKLCH its lightness is 68%, its chroma 0.174 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Sienna (#E76F51), ΔE 0.021 away. Black text reads best on it, at 6.68:1.
| Hue family | Reds |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Burnt Sienna (#E76F51) |
| Black text | 6.68:1 |
| White text | 3.14:1 |
Values
| HEX | #EF664F |
| RGB | rgb(239, 102, 79) |
| HSL | hsl(9, 83%, 62%) |
| OKLCH | oklch(67.7% 0.174 31.6) |
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 #EF664F | 3.14:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #EF664F | 6.68:1 | AA | Lc 46.3 | Large or bold text, headings |
| #EF664F text on white | 3.14:1 | AA large text | Lc 57.7 | Large or bold text, headings |
| #EF664F text on black | 6.68:1 | AA | Lc -44.0 | 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 400.
-
Step 50
50
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DD
oklch(93.6% 0.031 32.6)
-
Step 200
200
#FFCBC1
oklch(88.5% 0.061 30.9)
-
Step 300
300
#FFA695
oklch(80.9% 0.109 31.4)
-
Step 400
400 (this color)
#EF664F
oklch(67.7% 0.174 31.6)
-
Step 500
500
#F23B1F
oklch(63.1% 0.222 31.6)
-
Step 600
600
#D32100
oklch(55.6% 0.213 31.6)
-
Step 700
700
#B31A00
oklch(49.1% 0.188 31.6)
-
Step 800
800
#941400
oklch(42.7% 0.164 31.6)
-
Step 900
900
#7D0F00
oklch(37.8% 0.145 31.6)
-
Step 950
950
#4A0D05
oklch(27.1% 0.093 31.5)
#EF664F 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) | #8A7F4C | 0.179 |
| Deuteranopia (no green cones) | #AC9D4B | 0.166 |
| Tritanopia (no blue cones) | #FF4961 | 0.063 |
| Achromatopsia (no color) | #919191 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF664F
#EF664F
oklch(67.7% 0.174 31.6)
- #00AAC1
#00AAC1
oklch(67.7% 0.118 211.6)
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 #EF664F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Sienna #E76F51 ΔE 0.021
- Tomato #FF6347 ΔE 0.029
- Grapefruit #FD5956 ΔE 0.034
- Orange Pink #FF6F52 ΔE 0.037
- Coral Pink #FF6163 ΔE 0.040
- Pinkish Orange #FF724C ΔE 0.042
- Orange Pant #FB5607 ΔE 0.046
- Bright Orange #FF5B00 ΔE 0.049
Use #EF664F 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.