#279DD2
Closest named color: Dark Sky Blue (#448EE4). oklch(65.7% 0.126 233.7), rgb(39, 157, 210).
Aa
Black text reads best on this color (6.83:1).
About this color
#279DD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.126 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.056 away. Black text reads best on it, at 6.83:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.83:1 |
| White text | 3.07:1 |
Values
| HEX | #279DD2 |
| RGB | rgb(39, 157, 210) |
| HSL | hsl(199, 69%, 49%) |
| OKLCH | oklch(65.7% 0.126 233.7) |
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 #279DD2 | 3.07:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #279DD2 | 6.83:1 | AA | Lc 46.9 | Large or bold text, headings |
| #279DD2 text on white | 3.07:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #279DD2 text on black | 6.83:1 | AA | Lc -44.6 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C4DEED
oklch(88.6% 0.035 233.1)
-
Step 300
300
#9AC8E3
oklch(80.9% 0.062 234.3)
-
Step 400
400
#5CABD5
oklch(70.7% 0.099 233.8)
-
Step 500
500 (this color)
#279DD2
oklch(65.7% 0.126 233.7)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#042A3C
oklch(26.9% 0.053 234.4)
#279DD2 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) | #839CD4 | 0.079 |
| Deuteranopia (no green cones) | #6C8CD1 | 0.066 |
| Tritanopia (no blue cones) | #00ABAF | 0.077 |
| Achromatopsia (no color) | #939393 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #279DD2
#279DD2
oklch(65.7% 0.126 233.7)
- #CC7A40
#CC7A40
oklch(65.7% 0.126 53.8)
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 #279DD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.057
- Faded Blue #658CBB ΔE 0.062
- Water Blue #0E87CC ΔE 0.064
- Turquoise Blue #06B1C4 ΔE 0.067
- Blue NCS #118AB2 ΔE 0.068
- Cornflower Blue #6495ED ΔE 0.068
- Cool Blue #4984B8 ΔE 0.071
Use #279DD2 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.