#279AF4
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.9% 0.165 248), rgb(39, 154, 244).
Aa
Black text reads best on this color (7.01:1).
About this color
#279AF4 is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.165 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.021 away. Black text reads best on it, at 7.01:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.01:1 |
| White text | 2.99:1 |
Values
| HEX | #279AF4 |
| RGB | rgb(39, 154, 244) |
| HSL | hsl(206, 90%, 55%) |
| OKLCH | oklch(66.9% 0.165 248) |
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 #279AF4 | 2.99:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #279AF4 | 7.01:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #279AF4 text on white | 2.99:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #279AF4 text on black | 7.01:1 | AAA | Lc -45.7 | Large or bold text, headings |
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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#97C6F3
oklch(80.9% 0.081 247.8)
-
Step 400
400
#59A6ED
oklch(70.6% 0.13 248.4)
-
Step 500
500 (this color)
#279AF4
oklch(66.9% 0.165 248)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#032846
oklch(27% 0.069 248.1)
#279AF4 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) | #6F9FF8 | 0.059 |
| Deuteranopia (no green cones) | #508DF2 | 0.038 |
| Tritanopia (no blue cones) | #00B0BB | 0.119 |
| Achromatopsia (no color) | #959595 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #279AF4
#279AF4
oklch(66.9% 0.165 248)
- #CF8100
#CF8100
oklch(67% 0.147 68.1)
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 #279AF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.021
- Dodger Blue #1E90FF ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.043
- Soft Blue #6488EA ΔE 0.058
- Water Blue #0E87CC ΔE 0.076
- Clear Blue #247AFD ΔE 0.087
- Faded Blue #658CBB ΔE 0.091
Use #279AF4 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.