#2A8CDF
Closest named color: Dark Sky Blue (#448EE4). oklch(62.6% 0.153 249), rgb(42, 140, 223).
Aa
Black text reads best on this color (5.91:1).
About this color
#2A8CDF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.153 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.020 away. Black text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.91:1 |
| White text | 3.55:1 |
Values
| HEX | #2A8CDF |
| RGB | rgb(42, 140, 223) |
| HSL | hsl(208, 74%, 52%) |
| OKLCH | oklch(62.6% 0.153 249) |
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 #2A8CDF | 3.55:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #2A8CDF | 5.91:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #2A8CDF text on white | 3.55:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #2A8CDF text on black | 5.91:1 | AA | Lc -39.1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9BC5EF
oklch(80.8% 0.075 248.8)
-
Step 400
400
#61A6E8
oklch(70.7% 0.12 248.9)
-
Step 500
500 (this color)
#2A8CDF
oklch(62.6% 0.153 249)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#064474
oklch(37.8% 0.1 248.9)
-
Step 950
950
#082844
oklch(27% 0.064 249)
#2A8CDF 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) | #6491E2 | 0.051 |
| Deuteranopia (no green cones) | #4981DD | 0.033 |
| Tritanopia (no blue cones) | #00A0AB | 0.111 |
| Achromatopsia (no color) | #888888 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A8CDF
#2A8CDF
oklch(62.6% 0.153 249)
- #BC7600
#BC7600
oklch(62.6% 0.136 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 #2A8CDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.020
- Water Blue #0E87CC ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.040
- Dodger Blue #1E90FF ΔE 0.047
- Soft Blue #6488EA ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.059
- Cool Blue #4984B8 ΔE 0.060
- Steel Blue #4682B4 ΔE 0.066
Use #2A8CDF 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.