#EF671C
Closest named color: Bright Orange (#FF5B00). oklch(67.4% 0.185 44), rgb(239, 103, 28).
Aa
Black text reads best on this color (6.62:1).
About this color
#EF671C is a medium-light, vivid orange. In OKLCH its lightness is 67%, its chroma 0.185 and its hue 44°. Its hue sits on the warm side of the wheel. The nearest named color is Bright Orange (#FF5B00), ΔE 0.032 away. Black text reads best on it, at 6.62:1.
| Hue family | Oranges |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Bright Orange (#FF5B00) |
| Black text | 6.62:1 |
| White text | 3.16:1 |
Values
| HEX | #EF671C |
| RGB | rgb(239, 103, 28) |
| HSL | hsl(21, 87%, 52%) |
| OKLCH | oklch(67.4% 0.185 44) |
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 #EF671C | 3.16:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #EF671C | 6.62:1 | AA | Lc 46.1 | Large or bold text, headings |
| #EF671C text on white | 3.16:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #EF671C text on black | 6.62:1 | AA | Lc -43.8 | 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
#FFF2ED
oklch(97% 0.016 42.4)
-
Step 100
100
#FEE3D8
oklch(93.5% 0.033 43.5)
-
Step 200
200
#FFCCB7
oklch(88.4% 0.065 43.5)
-
Step 300
300
#FFA883
oklch(80.9% 0.115 43.7)
-
Step 400
400 (this color)
#EF671C
oklch(67.4% 0.185 44)
-
Step 500
500
#DF5A00
oklch(63.1% 0.183 44.1)
-
Step 600
600
#BC4B00
oklch(55.6% 0.161 44.3)
-
Step 700
700
#9F3E00
oklch(49.1% 0.142 44.2)
-
Step 800
800
#843200
oklch(42.8% 0.124 44.1)
-
Step 900
900
#6F2800
oklch(37.7% 0.111 43.6)
-
Step 950
950
#441600
oklch(27% 0.078 44.2)
#EF671C 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) | #8E7D08 | 0.176 |
| Deuteranopia (no green cones) | #AF9C14 | 0.159 |
| Tritanopia (no blue cones) | #FF455A | 0.093 |
| Achromatopsia (no color) | #919191 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF671C
#EF671C
oklch(67.4% 0.185 44)
- #00A6D0
#00A6D0
oklch(67.4% 0.127 224.2)
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 #EF671C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Orange #FF5B00 ΔE 0.032
- Orange Pant #FB5607 ΔE 0.032
- Burnt Sienna #E76F51 ΔE 0.040
- Pumpkin #E17701 ΔE 0.043
- Tomato #FF6347 ΔE 0.046
- Blood Orange #FE4B03 ΔE 0.048
- Pinkish Orange #FF724C ΔE 0.050
- Orange Pink #FF6F52 ΔE 0.053
Use #EF671C 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.