#378DFF
Closest named color: Dodger Blue (#1E90FF). oklch(65.1% 0.188 256.9), rgb(55, 141, 255).
Aa
Black text reads best on this color (6.41:1).
About this color
#378DFF is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.188 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.013 away. Black text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.41:1 |
| White text | 3.27:1 |
Values
| HEX | #378DFF |
| RGB | rgb(55, 141, 255) |
| HSL | hsl(214, 100%, 61%) |
| OKLCH | oklch(65.1% 0.188 256.9) |
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 #378DFF | 3.27:1 | AA large text | Lc -65.0 | Content text, not long reading |
| Black text on #378DFF | 6.41:1 | AA | Lc 44.5 | Non-text elements, placeholder text |
| #378DFF text on white | 3.27:1 | AA large text | Lc 59.6 | Large or bold text, headings |
| #378DFF text on black | 6.41:1 | AA | Lc -42.2 | 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
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFB
oklch(88.5% 0.051 256.7)
-
Step 300
300
#9BC3FC
oklch(80.9% 0.092 257.2)
-
Step 400
400
#61A1FB
oklch(70.6% 0.148 257.2)
-
Step 500
500 (this color)
#378DFF
oklch(65.1% 0.188 256.9)
-
Step 600
600
#006EE3
oklch(55.7% 0.197 256.9)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#0A3F81
oklch(37.7% 0.123 257)
-
Step 950
950
#09264B
oklch(27.1% 0.077 256.3)
#378DFF 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) | #5198FF | 0.038 |
| Deuteranopia (no green cones) | #2186FD | 0.023 |
| Tritanopia (no blue cones) | #00A8BA | 0.143 |
| Achromatopsia (no color) | #8E8E8E | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378DFF
#378DFF
oklch(65.1% 0.188 256.9)
- #BD8200
#BD8200
oklch(65% 0.136 76.8)
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 #378DFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.013
- Chefchaouen Blue #4895EF ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.041
- Soft Blue #6488EA ΔE 0.047
- Clear Blue #247AFD ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.054
- Cornflower #6A79F7 ΔE 0.062
- Water Blue #0E87CC ΔE 0.081
Use #378DFF 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.