#378BF6
Closest named color: Dodger Blue (#1E90FF). oklch(64.1% 0.179 256.2), rgb(55, 139, 246).
Aa
Black text reads best on this color (6.18:1).
About this color
#378BF6 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.179 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.019 away. Black text reads best on it, at 6.18:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.18:1 |
| White text | 3.39:1 |
Values
| HEX | #378BF6 |
| RGB | rgb(55, 139, 246) |
| HSL | hsl(214, 91%, 59%) |
| OKLCH | oklch(64.1% 0.179 256.2) |
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 #378BF6 | 3.39:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #378BF6 | 6.18:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #378BF6 text on white | 3.39:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #378BF6 text on black | 6.18:1 | AA | Lc -40.7 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9CC3F9
oklch(80.9% 0.088 256.6)
-
Step 400
400
#63A2F6
oklch(70.7% 0.14 256.1)
-
Step 500
500 (this color)
#378BF6
oklch(64.1% 0.179 256.2)
-
Step 600
600
#006FE0
oklch(55.6% 0.192 256.3)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9D
oklch(42.8% 0.147 256.2)
-
Step 900
900
#0D407E
oklch(37.7% 0.117 256.3)
-
Step 950
950
#0A264A
oklch(27% 0.075 256.3)
#378BF6 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) | #5495FA | 0.038 |
| Deuteranopia (no green cones) | #2D83F4 | 0.023 |
| Tritanopia (no blue cones) | #00A4B4 | 0.137 |
| Achromatopsia (no color) | #8B8B8B | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378BF6
#378BF6
oklch(64.1% 0.179 256.2)
- #BA7F00
#BA7F00
oklch(64% 0.134 76.2)
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 #378BF6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.019
- Dark Sky Blue #448EE4 ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.034
- Soft Blue #6488EA ΔE 0.041
- Clear Blue #247AFD ΔE 0.049
- Cornflower Blue #6495ED ΔE 0.053
- Cornflower #6A79F7 ΔE 0.060
- Water Blue #0E87CC ΔE 0.068
Use #378BF6 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.