#2D8ADB
Closest named color: Dark Sky Blue (#448EE4). oklch(61.9% 0.149 249.3), rgb(45, 138, 219).
Aa
Black text reads best on this color (5.76:1).
About this color
#2D8ADB is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.149 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.024 away. Black text reads best on it, at 5.76:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.76:1 |
| White text | 3.63:1 |
Values
| HEX | #2D8ADB |
| RGB | rgb(45, 138, 219) |
| HSL | hsl(208, 71%, 52%) |
| OKLCH | oklch(61.9% 0.149 249.3) |
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 #2D8ADB | 3.63:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #2D8ADB | 5.76:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #2D8ADB text on white | 3.63:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #2D8ADB text on black | 5.76:1 | AA | Lc -38.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9DC5EE
oklch(80.9% 0.072 249.4)
-
Step 400
400
#64A6E6
oklch(70.8% 0.116 249.1)
-
Step 500
500 (this color)
#2D8ADB
oklch(61.9% 0.149 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#0A4472
oklch(37.8% 0.096 248.7)
-
Step 950
950
#0A2843
oklch(27% 0.061 249.3)
#2D8ADB 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) | #648FDE | 0.050 |
| Deuteranopia (no green cones) | #497FD9 | 0.032 |
| Tritanopia (no blue cones) | #009DA8 | 0.108 |
| Achromatopsia (no color) | #868686 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D8ADB
#2D8ADB
oklch(61.9% 0.149 249.3)
- #B97400
#B97400
oklch(61.8% 0.135 69)
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 #2D8ADB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.024
- Water Blue #0E87CC ΔE 0.028
- Chefchaouen Blue #4895EF ΔE 0.046
- Soft Blue #6488EA ΔE 0.053
- Cool Blue #4984B8 ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.054
- Windows Blue #3778BF ΔE 0.059
- Steel Blue #4682B4 ΔE 0.059
Use #2D8ADB 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.