#378AF2
Closest named color: Dodger Blue (#1E90FF). oklch(63.6% 0.175 255.9), rgb(55, 138, 242).
Aa
Black text reads best on this color (6.07:1).
About this color
#378AF2 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.175 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.024 away. Black text reads best on it, at 6.07:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.07:1 |
| White text | 3.45:1 |
Values
| HEX | #378AF2 |
| RGB | rgb(55, 138, 242) |
| HSL | hsl(213, 88%, 58%) |
| OKLCH | oklch(63.6% 0.175 255.9) |
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 #378AF2 | 3.45:1 | AA large text | Lc -67.1 | Content text, not long reading |
| Black text on #378AF2 | 6.07:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #378AF2 text on white | 3.45:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #378AF2 text on black | 6.07:1 | AA | Lc -40.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC3F8
oklch(80.8% 0.086 256.2)
-
Step 400
400
#64A2F4
oklch(70.6% 0.137 255.9)
-
Step 500
500 (this color)
#378AF2
oklch(63.6% 0.175 255.9)
-
Step 600
600
#006FDE
oklch(55.5% 0.189 256)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#0E407C
oklch(37.6% 0.114 256)
-
Step 950
950
#0B2649
oklch(27% 0.073 256.3)
#378AF2 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) | #5593F6 | 0.037 |
| Deuteranopia (no green cones) | #3182F0 | 0.022 |
| Tritanopia (no blue cones) | #00A3B2 | 0.134 |
| Achromatopsia (no color) | #8A8A8A | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378AF2
#378AF2
oklch(63.6% 0.175 255.9)
- #B97E00
#B97E00
oklch(63.7% 0.134 76)
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 #378AF2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.035
- Soft Blue #6488EA ΔE 0.040
- Clear Blue #247AFD ΔE 0.049
- Cornflower Blue #6495ED ΔE 0.053
- Cornflower #6A79F7 ΔE 0.060
- Water Blue #0E87CC ΔE 0.062
Use #378AF2 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.