#279BD3
Closest named color: Dark Sky Blue (#448EE4). oklch(65.3% 0.128 235.6), rgb(39, 155, 211).
Aa
Black text reads best on this color (6.71:1).
About this color
#279BD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.128 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.050 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #279BD3 |
| RGB | rgb(39, 155, 211) |
| HSL | hsl(200, 69%, 49%) |
| OKLCH | oklch(65.3% 0.128 235.6) |
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 #279BD3 | 3.12:1 | AA large text | Lc -63.3 | Content text, not long reading |
| Black text on #279BD3 | 6.71:1 | AA | Lc 46.2 | Large or bold text, headings |
| #279BD3 text on white | 3.12:1 | AA large text | Lc 57.9 | Large or bold text, headings |
| #279BD3 text on black | 6.71:1 | AA | Lc -43.9 | 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
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDED
oklch(88.4% 0.035 235.9)
-
Step 300
300
#9AC8E4
oklch(81% 0.063 235.3)
-
Step 400
400
#5DAAD6
oklch(70.6% 0.1 235.6)
-
Step 500
500 (this color)
#279BD3
oklch(65.3% 0.128 235.6)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950
#052A3D
oklch(27% 0.053 236.3)
#279BD3 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) | #809AD6 | 0.076 |
| Deuteranopia (no green cones) | #698BD2 | 0.062 |
| Tritanopia (no blue cones) | #00AAAE | 0.081 |
| Achromatopsia (no color) | #929292 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #279BD3
#279BD3
oklch(65.3% 0.128 235.6)
- #CB793A
#CB793A
oklch(65.4% 0.128 55.4)
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 #279BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.053
- Water Blue #0E87CC ΔE 0.058
- Faded Blue #658CBB ΔE 0.060
- Blue NCS #118AB2 ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.065
- Cool Blue #4984B8 ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.073
Use #279BD3 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.