#0073D8
Closest named color: Cerulean Blue (#056EEE). oklch(55.9% 0.177 253.9), rgb(0, 115, 216).
Aa
White text reads best on this color (4.72:1).
About this color
#0073D8 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.177 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.037 away. White text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.44:1 |
| White text | 4.72:1 |
Values
| HEX | #0073D8 |
| RGB | rgb(0, 115, 216) |
| HSL | hsl(208, 100%, 42%) |
| OKLCH | oklch(55.9% 0.177 253.9) |
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 #0073D8 | 4.72:1 | AA | Lc -77.5 | Fine for body text |
| Black text on #0073D8 | 4.44:1 | AA large text | Lc 32.1 | Non-text elements, placeholder text |
| #0073D8 text on white | 4.72:1 | AA | Lc 72.0 | Content text, not long reading |
| #0073D8 text on black | 4.44:1 | AA large text | Lc -29.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9DC4F4
oklch(80.9% 0.08 253.9)
-
Step 400
400
#65A4EE
oklch(70.8% 0.127 253.5)
-
Step 500
500
#368AE9
oklch(63% 0.164 254.1)
-
Step 600
600 (this color)
#0073D8
oklch(55.9% 0.177 253.9)
-
Step 700
700
#0060B5
oklch(49.2% 0.155 253.6)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900
#0F4278
oklch(37.8% 0.106 253.7)
-
Step 950
950
#0B2746
oklch(27% 0.067 253.4)
#0073D8 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) | #387CDC | 0.038 |
| Deuteranopia (no green cones) | #006BD6 | 0.021 |
| Tritanopia (no blue cones) | #008C9B | 0.132 |
| Achromatopsia (no color) | #737373 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0073D8
#0073D8
oklch(55.9% 0.177 253.9)
- #9D6800
#9D6800
oklch(56% 0.119 74.1)
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 #0073D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.037
- Royal Blue #4169E1 ΔE 0.041
- Windows Blue #3778BF ΔE 0.049
- Mid Blue #276AB3 ΔE 0.059
- Clear Blue #247AFD ΔE 0.061
- Water Blue #0E87CC ΔE 0.062
- Azul #1D5DEC ΔE 0.063
- Neon Blue #4361EE ΔE 0.063
Use #0073D8 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.