#0073E1
Closest named color: Cerulean Blue (#056EEE). oklch(56.6% 0.188 255.3), rgb(0, 115, 225).
Aa
White text reads best on this color (4.62:1).
About this color
#0073E1 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.188 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.024 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #0073E1 |
| RGB | rgb(0, 115, 225) |
| HSL | hsl(209, 100%, 44%) |
| OKLCH | oklch(56.6% 0.188 255.3) |
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 #0073E1 | 4.62:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #0073E1 | 4.53:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #0073E1 text on white | 4.62:1 | AA | Lc 71.3 | Content text, not long reading |
| #0073E1 text on black | 4.53:1 | AA | Lc -30.4 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
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
#64A3F3
oklch(70.8% 0.135 255.1)
-
Step 500
500
#3489EF
oklch(63.1% 0.173 255.3)
-
Step 600
600 (this color)
#0073E1
oklch(56.6% 0.188 255.3)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#0D417C
oklch(37.8% 0.113 255.2)
-
Step 950
950
#0A2648
oklch(26.9% 0.072 255.3)
#0073E1 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) | #2D7EE5 | 0.036 |
| Deuteranopia (no green cones) | #006CDF | 0.018 |
| Tritanopia (no blue cones) | #008E9F | 0.141 |
| Achromatopsia (no color) | #757575 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0073E1
#0073E1
oklch(56.6% 0.188 255.3)
- #9E6A00
#9E6A00
oklch(56.5% 0.119 75.2)
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 #0073E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.024
- Royal Blue #4169E1 ΔE 0.037
- Clear Blue #247AFD ΔE 0.048
- Bright Blue #0165FC ΔE 0.054
- Neon Blue #4361EE ΔE 0.055
- Azul #1D5DEC ΔE 0.056
- Windows Blue #3778BF ΔE 0.060
- Water Blue #0E87CC ΔE 0.068
Use #0073E1 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.