#278EF1
Closest named color: Dodger Blue (#1E90FF). oklch(64% 0.173 252.1), rgb(39, 142, 241).
Aa
Black text reads best on this color (6.22:1).
About this color
#278EF1 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.173 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.021 away. Black text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.22:1 |
| White text | 3.37:1 |
Values
| HEX | #278EF1 |
| RGB | rgb(39, 142, 241) |
| HSL | hsl(209, 88%, 55%) |
| OKLCH | oklch(64% 0.173 252.1) |
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 #278EF1 | 3.37:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #278EF1 | 6.22:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #278EF1 text on white | 3.37:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #278EF1 text on black | 6.22:1 | AA | Lc -41.0 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C3DCF8
oklch(88.5% 0.047 251.3)
-
Step 300
300
#99C5F6
oklch(81% 0.084 251.6)
-
Step 400
400
#5DA4F2
oklch(70.6% 0.136 252.2)
-
Step 500
500 (this color)
#278EF1
oklch(64% 0.173 252.1)
-
Step 600
600
#0074D1
oklch(55.7% 0.167 252.1)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#00427B
oklch(37.7% 0.113 252.1)
-
Step 950
950
#062748
oklch(27% 0.072 252.2)
#278EF1 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) | #5C95F5 | 0.046 |
| Deuteranopia (no green cones) | #3884EF | 0.026 |
| Tritanopia (no blue cones) | #00A6B4 | 0.128 |
| Achromatopsia (no color) | #8C8C8C | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #278EF1
#278EF1
oklch(64% 0.173 252.1)
- #BE7C00
#BE7C00
oklch(64% 0.137 72.2)
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 #278EF1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.021
- Dark Sky Blue #448EE4 ΔE 0.025
- Chefchaouen Blue #4895EF ΔE 0.031
- Soft Blue #6488EA ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.053
- Clear Blue #247AFD ΔE 0.057
- Water Blue #0E87CC ΔE 0.059
- Cornflower #6A79F7 ΔE 0.072
Use #278EF1 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.