#278EF8
Closest named color: Dodger Blue (#1E90FF). oklch(64.5% 0.182 253.4), rgb(39, 142, 248).
Aa
Black text reads best on this color (6.31:1).
About this color
#278EF8 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.182 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.011 away. Black text reads best on it, at 6.31:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.31:1 |
| White text | 3.32:1 |
Values
| HEX | #278EF8 |
| RGB | rgb(39, 142, 248) |
| HSL | hsl(210, 94%, 56%) |
| OKLCH | oklch(64.5% 0.182 253.4) |
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 #278EF8 | 3.32:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #278EF8 | 6.31:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #278EF8 text on white | 3.32:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #278EF8 text on black | 6.31:1 | AA | Lc -41.6 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCFA
oklch(88.6% 0.049 253.1)
-
Step 300
300
#98C4F9
oklch(80.8% 0.089 253.5)
-
Step 400
400
#5CA4F7
oklch(70.8% 0.142 253.3)
-
Step 500
500 (this color)
#278EF8
oklch(64.5% 0.182 253.4)
-
Step 600
600
#0073D5
oklch(55.7% 0.173 253.3)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004E95
oklch(42.6% 0.134 253.6)
-
Step 900
900
#00417E
oklch(37.7% 0.118 253.6)
-
Step 950
950
#06274A
oklch(27.1% 0.075 253.4)
#278EF8 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) | #5797FC | 0.044 |
| Deuteranopia (no green cones) | #2D84F6 | 0.025 |
| Tritanopia (no blue cones) | #00A7B7 | 0.134 |
| Achromatopsia (no color) | #8D8D8D | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #278EF8
#278EF8
oklch(64.5% 0.182 253.4)
- #BF7E00
#BF7E00
oklch(64.5% 0.137 73.1)
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 #278EF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.011
- Dark Sky Blue #448EE4 ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.034
- Soft Blue #6488EA ΔE 0.049
- Clear Blue #247AFD ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.055
- Water Blue #0E87CC ΔE 0.069
- Cornflower #6A79F7 ΔE 0.070
Use #278EF8 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.