#0073A4
Closest named color: Ocean Blue (#03719C). oklch(52.6% 0.115 236.9), rgb(0, 115, 164).
Aa
White text reads best on this color (5.26:1).
About this color
#0073A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.115 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.013 away. White text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #0073A4 |
| RGB | rgb(0, 115, 164) |
| HSL | hsl(198, 100%, 32%) |
| OKLCH | oklch(52.6% 0.115 236.9) |
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 #0073A4 | 5.26:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #0073A4 | 3.98:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #0073A4 text on white | 5.26:1 | AA | Lc 75.5 | Fine for body text |
| #0073A4 text on black | 3.98:1 | AA large text | Lc -26.2 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEA
oklch(88.4% 0.029 238.3)
-
Step 300
300
#A2C6DE
oklch(80.8% 0.051 237.5)
-
Step 400
400
#6DA9CE
oklch(70.8% 0.083 236.7)
-
Step 500
500
#4192C1
oklch(63% 0.106 237.3)
-
Step 600
600 (this color)
#0073A4
oklch(52.6% 0.115 236.9)
-
Step 700
700
#016895
oklch(49% 0.107 237.1)
-
Step 800
800
#0B5579
oklch(42.7% 0.089 237.1)
-
Step 900
900
#164761
oklch(37.8% 0.068 236)
-
Step 950
950
#0F2939
oklch(26.9% 0.044 238.4)
#0073A4 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) | #5B73A6 | 0.064 |
| Deuteranopia (no green cones) | #4766A3 | 0.051 |
| Tritanopia (no blue cones) | #008084 | 0.073 |
| Achromatopsia (no color) | #6C6C6C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0073A4
#0073A4
oklch(52.6% 0.115 236.9)
- #9B571A
#9B571A
oklch(52.6% 0.114 57.2)
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 #0073A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.013
- Sea Blue #047495 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.026
- Muted Blue #3B719F ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.031
- Peacock Blue #016795 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.041
- Ocean #017B92 ΔE 0.042
Use #0073A4 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.