#375CD3
Closest named color: Warm Blue (#4B57DB). oklch(51.9% 0.188 266.6), rgb(55, 92, 211).
Aa
White text reads best on this color (5.77:1).
About this color
#375CD3 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.188 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.027 away. White text reads best on it, at 5.77:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #375CD3 |
| RGB | rgb(55, 92, 211) |
| HSL | hsl(226, 64%, 52%) |
| OKLCH | oklch(51.9% 0.188 266.6) |
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 #375CD3 | 5.77:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #375CD3 | 3.63:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #375CD3 text on white | 5.77:1 | AA | Lc 78.4 | Fine for body text |
| #375CD3 text on black | 3.63:1 | AA large text | Lc -23.4 | 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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A6C0FC
oklch(81% 0.09 266.3)
-
Step 400
400
#779CFB
oklch(70.7% 0.145 266.6)
-
Step 500
500
#5680F9
oklch(63.2% 0.186 266.7)
-
Step 600
600
#3D65E8
oklch(55.6% 0.203 266.7)
-
Step 700
700 (this color)
#375CD3
oklch(51.9% 0.188 266.6)
-
Step 800
800
#2845A3
oklch(42.8% 0.156 266.6)
-
Step 900
900
#243B81
oklch(37.7% 0.122 266.8)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#375CD3 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) | #006DD7 | 0.045 |
| Deuteranopia (no green cones) | #005FD1 | 0.029 |
| Tritanopia (no blue cones) | #00798E | 0.149 |
| Achromatopsia (no color) | #666666 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375CD3
#375CD3
oklch(51.9% 0.188 266.6)
- #836300
#836300
oklch(51.8% 0.106 86.4)
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 #375CD3, closest first.
No curated palette has a color within ΔE 0.04 of #375CD3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.027
- Royal Blue #4169E1 ΔE 0.041
- Azul #1D5DEC ΔE 0.042
- Neon Blue #4361EE ΔE 0.046
- Iris #6258C4 ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.061
- Mid Blue #276AB3 ΔE 0.066
Use #375CD3 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.