#375BE0
Closest named color: Warm Blue (#4B57DB). oklch(52.8% 0.206 267.2), rgb(55, 91, 224).
Aa
White text reads best on this color (5.62:1).
About this color
#375BE0 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.206 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.023 away. White text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.206) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #375BE0 |
| RGB | rgb(55, 91, 224) |
| HSL | hsl(227, 73%, 55%) |
| OKLCH | oklch(52.8% 0.206 267.2) |
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 #375BE0 | 5.62:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #375BE0 | 3.73:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #375BE0 text on white | 5.62:1 | AA | Lc 77.5 | Fine for body text |
| #375BE0 text on black | 3.73:1 | AA large text | Lc -24.3 | 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
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A6BFFD
oklch(80.8% 0.092 267.4)
-
Step 400
400
#779BFD
oklch(70.6% 0.149 267.3)
-
Step 500
500
#567FFB
oklch(63.1% 0.19 267.1)
-
Step 600
600 (this color)
#375BE0
oklch(52.8% 0.206 267.2)
-
Step 700
700
#3152CB
oklch(49.1% 0.191 267.1)
-
Step 800
800
#2944A4
oklch(42.7% 0.158 267.3)
-
Step 900
900
#243B82
oklch(37.7% 0.123 266.8)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#375BE0 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) | #0070E4 | 0.051 |
| Deuteranopia (no green cones) | #0060DD | 0.029 |
| Tritanopia (no blue cones) | #007D95 | 0.162 |
| Achromatopsia (no color) | #676767 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375BE0
#375BE0
oklch(52.8% 0.206 267.2)
- #866600
#866600
oklch(52.8% 0.108 87)
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 #375BE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.023
- Azul #1D5DEC ΔE 0.025
- Neon Blue #4361EE ΔE 0.030
- Royal Blue #4169E1 ΔE 0.037
- Cerulean Blue #056EEE ΔE 0.049
- Bright Blue #0165FC ΔE 0.051
- Electric Blue #0652FF ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.065
Use #375BE0 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.