#0075E3
Closest named color: Cerulean Blue (#056EEE). oklch(57.2% 0.189 255.1), rgb(0, 117, 227).
Aa
Black text reads best on this color (4.65:1).
About this color
#0075E3 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.189 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.025 away. Black text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.65:1 |
| White text | 4.51:1 |
Values
| HEX | #0075E3 |
| RGB | rgb(0, 117, 227) |
| HSL | hsl(209, 100%, 45%) |
| OKLCH | oklch(57.2% 0.189 255.1) |
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 #0075E3 | 4.51:1 | AA | Lc -76.0 | Fine for body text |
| Black text on #0075E3 | 4.65:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #0075E3 text on white | 4.51:1 | AA | Lc 70.5 | Content text, not long reading |
| #0075E3 text on black | 4.65:1 | AA | Lc -31.2 | 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 600.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC4F7
oklch(81% 0.084 254.7)
-
Step 400
400
#63A3F3
oklch(70.7% 0.135 254.8)
-
Step 500
500
#3389EF
oklch(63.1% 0.173 255.1)
-
Step 600
600 (this color)
#0075E3
oklch(57.2% 0.189 255.1)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900
#0C417C
oklch(37.8% 0.113 255)
-
Step 950
950
#0A2648
oklch(26.9% 0.072 255.3)
#0075E3 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) | #3080E7 | 0.037 |
| Deuteranopia (no green cones) | #006EE1 | 0.018 |
| Tritanopia (no blue cones) | #0090A1 | 0.141 |
| Achromatopsia (no color) | #767676 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0075E3
#0075E3
oklch(57.2% 0.189 255.1)
- #A16C00
#A16C00
oklch(57.3% 0.121 75.1)
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 #0075E3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.025
- Royal Blue #4169E1 ΔE 0.039
- Clear Blue #247AFD ΔE 0.044
- Bright Blue #0165FC ΔE 0.055
- Neon Blue #4361EE ΔE 0.057
- Azul #1D5DEC ΔE 0.059
- Windows Blue #3778BF ΔE 0.061
- Water Blue #0E87CC ΔE 0.065
Use #0075E3 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.