#0073D5
Closest named color: Cerulean Blue (#056EEE). oklch(55.7% 0.173 253.3), rgb(0, 115, 213).
Aa
White text reads best on this color (4.75:1).
About this color
#0073D5 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.173 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.041 away. White text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.41:1 |
| White text | 4.75:1 |
Values
| HEX | #0073D5 |
| RGB | rgb(0, 115, 213) |
| HSL | hsl(208, 100%, 42%) |
| OKLCH | oklch(55.7% 0.173 253.3) |
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 #0073D5 | 4.75:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #0073D5 | 4.41:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #0073D5 text on white | 4.75:1 | AA | Lc 72.3 | Content text, not long reading |
| #0073D5 text on black | 4.41:1 | AA large text | Lc -29.4 | 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 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
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9DC4F2
oklch(80.8% 0.078 252.9)
-
Step 400
400
#66A4EC
oklch(70.7% 0.124 253.2)
-
Step 500
500
#378BE6
oklch(63.1% 0.159 253.2)
-
Step 600
600 (this color)
#0073D5
oklch(55.7% 0.173 253.3)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004E95
oklch(42.6% 0.134 253.6)
-
Step 900
900
#0F4277
oklch(37.7% 0.104 253.4)
-
Step 950
950
#0B2746
oklch(27% 0.067 253.4)
#0073D5 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) | #3B7CD9 | 0.040 |
| Deuteranopia (no green cones) | #006BD3 | 0.021 |
| Tritanopia (no blue cones) | #008B99 | 0.129 |
| Achromatopsia (no color) | #737373 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0073D5
#0073D5
oklch(55.7% 0.173 253.3)
- #9D6700
#9D6700
oklch(55.8% 0.119 73.3)
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 #0073D5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.041
- Royal Blue #4169E1 ΔE 0.044
- Windows Blue #3778BF ΔE 0.045
- Mid Blue #276AB3 ΔE 0.055
- Water Blue #0E87CC ΔE 0.060
- Nice Blue #107AB0 ΔE 0.064
- Clear Blue #247AFD ΔE 0.065
- Azul #1D5DEC ΔE 0.066
Use #0073D5 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.