#279EDA
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.4% 0.133 236.9), rgb(39, 158, 218).
Aa
Black text reads best on this color (6.98:1).
About this color
#279EDA is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.133 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.048 away. Black text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #279EDA |
| RGB | rgb(39, 158, 218) |
| HSL | hsl(200, 71%, 50%) |
| OKLCH | oklch(66.4% 0.133 236.9) |
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 #279EDA | 3.00:1 | AA large text | Lc -61.6 | Content text, not long reading |
| Black text on #279EDA | 6.98:1 | AA | Lc 47.8 | Large or bold text, headings |
| #279EDA text on white | 3.00:1 | AA large text | Lc 56.3 | Large or bold text, headings |
| #279EDA text on black | 6.98:1 | AA | Lc -45.5 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEE
oklch(88.4% 0.036 237.6)
-
Step 300
300
#99C8E6
oklch(81% 0.065 236.6)
-
Step 400
400
#5BAAD9
oklch(70.7% 0.104 236.9)
-
Step 500
500 (this color)
#279EDA
oklch(66.4% 0.133 236.9)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#042A3E
oklch(27.1% 0.055 237.2)
#279EDA 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) | #819EDD | 0.076 |
| Deuteranopia (no green cones) | #698ED9 | 0.061 |
| Tritanopia (no blue cones) | #00ADB3 | 0.083 |
| Achromatopsia (no color) | #959595 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #279EDA
#279EDA
oklch(66.4% 0.133 236.9)
- #D07C36
#D07C36
oklch(66.5% 0.133 57)
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 #279EDA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.060
- Water Blue #0E87CC ΔE 0.067
- Faded Blue #658CBB ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.071
- Dodger Blue #1E90FF ΔE 0.074
- Blue NCS #118AB2 ΔE 0.077
Use #279EDA 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.