#0273A9
Closest named color: Ocean Blue (#03719C). oklch(52.9% 0.12 239.6), rgb(2, 115, 169).
Aa
White text reads best on this color (5.21:1).
About this color
#0273A9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.120 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.021 away. White text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 4.02:1 |
| White text | 5.21:1 |
Values
| HEX | #0273A9 |
| RGB | rgb(2, 115, 169) |
| HSL | hsl(199, 98%, 34%) |
| OKLCH | oklch(52.9% 0.12 239.6) |
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 #0273A9 | 5.21:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #0273A9 | 4.02:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #0273A9 text on white | 5.21:1 | AA | Lc 75.3 | Fine for body text |
| #0273A9 text on black | 4.02:1 | AA large text | Lc -26.5 | 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
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6E0
oklch(80.9% 0.053 239.7)
-
Step 400
400
#6DA8D1
oklch(70.7% 0.086 239.9)
-
Step 500
500
#4092C5
oklch(63.2% 0.11 239.3)
-
Step 600
600 (this color)
#0273A9
oklch(52.9% 0.12 239.6)
-
Step 700
700
#016799
oklch(49% 0.112 240.1)
-
Step 800
800
#0B557C
oklch(42.8% 0.092 239.2)
-
Step 900
900
#154664
oklch(37.7% 0.073 240)
-
Step 950
950
#0E293A
oklch(26.9% 0.046 239.3)
#0273A9 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) | #5974AB | 0.061 |
| Deuteranopia (no green cones) | #4467A8 | 0.047 |
| Tritanopia (no blue cones) | #008186 | 0.079 |
| Achromatopsia (no color) | #6C6C6C | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0273A9
#0273A9
oklch(52.9% 0.12 239.6)
- #9D580D
#9D580D
oklch(53% 0.12 59.7)
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 #0273A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.021
- Nice Blue #107AB0 ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.029
- Muted Blue #3B719F ΔE 0.030
- Sea Blue #047495 ΔE 0.033
- Mid Blue #276AB3 ΔE 0.034
- French Blue #436BAD ΔE 0.042
- Peacock Blue #016795 ΔE 0.043
Use #0273A9 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.