#0280C4
Closest named color: Water Blue (#0E87CC). oklch(57.6% 0.139 243.1), rgb(2, 128, 196).
Aa
Black text reads best on this color (4.88:1).
About this color
#0280C4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.139 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #0280C4 |
| RGB | rgb(2, 128, 196) |
| HSL | hsl(201, 98%, 39%) |
| OKLCH | oklch(57.6% 0.139 243.1) |
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 #0280C4 | 4.29:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #0280C4 | 4.88:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #0280C4 text on white | 4.29:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #0280C4 text on black | 4.88:1 | AA | Lc -32.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DCEF
oklch(88.4% 0.035 244.2)
-
Step 300
300
#9EC6E6
oklch(80.9% 0.062 242.7)
-
Step 400
400
#66A8DA
oklch(70.7% 0.1 242.7)
-
Step 500
500
#3591D0
oklch(63.1% 0.128 242.9)
-
Step 600
600 (this color)
#0280C4
oklch(57.6% 0.139 243.1)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#0D456A
oklch(37.6% 0.084 243.6)
-
Step 950
950
#0B293E
oklch(27% 0.053 242.9)
#0280C4 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) | #5F82C7 | 0.061 |
| Deuteranopia (no green cones) | #4573C3 | 0.045 |
| Tritanopia (no blue cones) | #009199 | 0.094 |
| Achromatopsia (no color) | #7A7A7A | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0280C4
#0280C4
oklch(57.6% 0.139 243.1)
- #AE6500
#AE6500
oklch(57.7% 0.131 63.3)
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 #0280C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Windows Blue #3778BF ΔE 0.027
- Nice Blue #107AB0 ΔE 0.032
- Steel Blue #4682B4 ΔE 0.042
- Cool Blue #4984B8 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.052
- Off Blue #5684AE ΔE 0.061
Use #0280C4 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.