#375AE4
Closest named color: Azul (#1D5DEC). oklch(52.9% 0.213 267.4), rgb(55, 90, 228).
Aa
White text reads best on this color (5.60:1).
About this color
#375AE4 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.213 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.022 away. White text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #375AE4 |
| RGB | rgb(55, 90, 228) |
| HSL | hsl(228, 76%, 55%) |
| OKLCH | oklch(52.9% 0.213 267.4) |
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 #375AE4 | 5.60:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #375AE4 | 3.74:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #375AE4 text on white | 5.60:1 | AA | Lc 77.4 | Fine for body text |
| #375AE4 text on black | 3.74:1 | AA large text | Lc -24.4 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FD
oklch(88.6% 0.052 267.4)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567EFE
oklch(63.2% 0.195 267.5)
-
Step 600
600 (this color)
#375AE4
oklch(52.9% 0.213 267.4)
-
Step 700
700
#3151CF
oklch(49.2% 0.198 267.4)
-
Step 800
800
#2843A7
oklch(42.7% 0.164 267.3)
-
Step 900
900
#243A84
oklch(37.7% 0.127 267.4)
-
Step 950
950
#15234D
oklch(27% 0.08 267.1)
#375AE4 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) | #0070E9 | 0.053 |
| Deuteranopia (no green cones) | #0060E1 | 0.029 |
| Tritanopia (no blue cones) | #007D96 | 0.167 |
| Achromatopsia (no color) | #686868 | 0.213 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375AE4
#375AE4
oklch(52.9% 0.213 267.4)
- #866700
#866700
oklch(53% 0.108 87.8)
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 #375AE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.022
- Warm Blue #4B57DB ΔE 0.025
- Neon Blue #4361EE ΔE 0.027
- Royal Blue #4169E1 ΔE 0.039
- Bright Blue #0165FC ΔE 0.047
- Cerulean Blue #056EEE ΔE 0.049
- Electric Blue #0652FF ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.068
Use #375AE4 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.