#0375EE
Closest named color: Cerulean Blue (#056EEE). oklch(58% 0.202 256.7), rgb(3, 117, 238).
Aa
Black text reads best on this color (4.78:1).
About this color
#0375EE is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.202 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.017 away. Black text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.202) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.78:1 |
| White text | 4.39:1 |
Values
| HEX | #0375EE |
| RGB | rgb(3, 117, 238) |
| HSL | hsl(211, 98%, 47%) |
| OKLCH | oklch(58% 0.202 256.7) |
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 #0375EE | 4.39:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #0375EE | 4.78:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #0375EE text on white | 4.39:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #0375EE text on black | 4.78:1 | AA | Lc -32.1 | 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 600.
-
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
#9BC3FB
oklch(80.9% 0.091 256.9)
-
Step 400
400
#62A2FA
oklch(70.8% 0.146 256.7)
-
Step 500
500
#3187F7
oklch(63.1% 0.186 256.8)
-
Step 600
600 (this color)
#0375EE
oklch(58% 0.202 256.7)
-
Step 700
700
#005CBF
oklch(49% 0.172 256.8)
-
Step 800
800
#004B9E
oklch(42.6% 0.15 256.7)
-
Step 900
900
#0B3F80
oklch(37.6% 0.122 257)
-
Step 950
950
#09264B
oklch(27.1% 0.077 256.3)
#0375EE 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) | #1D82F2 | 0.036 |
| Deuteranopia (no green cones) | #006FEC | 0.015 |
| Tritanopia (no blue cones) | #0093A6 | 0.152 |
| Achromatopsia (no color) | #787878 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0375EE
#0375EE
oklch(58% 0.202 256.7)
- #A26F00
#A26F00
oklch(58% 0.121 76.9)
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 #0375EE, closest first.
No curated palette has a color within ΔE 0.04 of #0375EE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.017
- Clear Blue #247AFD ΔE 0.029
- Royal Blue #4169E1 ΔE 0.041
- Bright Blue #0165FC ΔE 0.044
- Neon Blue #4361EE ΔE 0.052
- Azul #1D5DEC ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.074
- Windows Blue #3778BF ΔE 0.076
Use #0375EE 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.