#028ACB
Closest named color: Water Blue (#0E87CC). oklch(60.4% 0.138 240.1), rgb(2, 138, 203).
Aa
Black text reads best on this color (5.50:1).
About this color
#028ACB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.138 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.009 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #028ACB |
| RGB | rgb(2, 138, 203) |
| HSL | hsl(199, 98%, 40%) |
| OKLCH | oklch(60.4% 0.138 240.1) |
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 #028ACB | 3.81:1 | AA large text | Lc -70.5 | Content text, not long reading |
| Black text on #028ACB | 5.50:1 | AA | Lc 39.1 | Non-text elements, placeholder text |
| #028ACB text on white | 3.81:1 | AA large text | Lc 65.0 | Content text, not long reading |
| #028ACB text on black | 5.50:1 | AA | Lc -36.6 | 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 500.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C4DDF0
oklch(88.5% 0.037 240.7)
-
Step 300
300
#99C7E8
oklch(80.9% 0.067 239.8)
-
Step 400
400
#5CA9DD
oklch(70.7% 0.108 240.2)
-
Step 500
500 (this color)
#028ACB
oklch(60.4% 0.138 240.1)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#04293F
oklch(26.8% 0.057 240.3)
#028ACB 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) | #6A8BCE | 0.069 |
| Deuteranopia (no green cones) | #517BCA | 0.054 |
| Tritanopia (no blue cones) | #009AA1 | 0.090 |
| Achromatopsia (no color) | #828282 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #028ACB
#028ACB
oklch(60.4% 0.138 240.1)
- #BC6A0C
#BC6A0C
oklch(60.5% 0.138 60)
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 #028ACB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.009
- Blue NCS #118AB2 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.044
- Windows Blue #3778BF ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.051
- Nice Blue #107AB0 ΔE 0.056
- Off Blue #5684AE ΔE 0.058
Use #028ACB 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.