#0073B4
Closest named color: Nice Blue (#107AB0). oklch(53.6% 0.133 244.2), rgb(0, 115, 180).
Aa
White text reads best on this color (5.10:1).
About this color
#0073B4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.133 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.024 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #0073B4 |
| RGB | rgb(0, 115, 180) |
| HSL | hsl(202, 100%, 35%) |
| OKLCH | oklch(53.6% 0.133 244.2) |
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 #0073B4 | 5.10:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #0073B4 | 4.11:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #0073B4 text on white | 5.10:1 | AA | Lc 74.6 | Content text, not long reading |
| #0073B4 text on black | 4.11:1 | AA large text | Lc -27.1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#A1C6E5
oklch(81% 0.059 243.9)
-
Step 400
400
#6BA7D8
oklch(70.7% 0.095 244.4)
-
Step 500
500
#3E90CE
oklch(63.1% 0.123 244.5)
-
Step 600
600 (this color)
#0073B4
oklch(53.6% 0.133 244.2)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#075382
oklch(42.6% 0.102 244.1)
-
Step 900
900
#144569
oklch(37.7% 0.08 244.8)
-
Step 950
950
#0E293D
oklch(27.1% 0.05 243.6)
#0073B4 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) | #5376B7 | 0.055 |
| Deuteranopia (no green cones) | #3B67B3 | 0.040 |
| Tritanopia (no blue cones) | #00838B | 0.091 |
| Achromatopsia (no color) | #6E6E6E | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0073B4
#0073B4
oklch(53.6% 0.133 244.2)
- #9D5C00
#9D5C00
oklch(53.7% 0.121 64.4)
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 #0073B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.024
- Mid Blue #276AB3 ΔE 0.026
- Flat Blue #3C73A8 ΔE 0.033
- Windows Blue #3778BF ΔE 0.035
- Ocean Blue #03719C ΔE 0.038
- French Blue #436BAD ΔE 0.039
- Muted Blue #3B719F ΔE 0.040
- Sea Blue #047495 ΔE 0.051
Use #0073B4 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.