#028BB4
Closest named color: Blue NCS (#118AB2). oklch(59.4% 0.115 227.7), rgb(2, 139, 180).
Aa
Black text reads best on this color (5.35:1).
About this color
#028BB4 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.115 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.004 away. Black text reads best on it, at 5.35:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.35:1 |
| White text | 3.92:1 |
Values
| HEX | #028BB4 |
| RGB | rgb(2, 139, 180) |
| HSL | hsl(194, 98%, 36%) |
| OKLCH | oklch(59.4% 0.115 227.7) |
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 #028BB4 | 3.92:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #028BB4 | 5.35:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #028BB4 text on white | 3.92:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #028BB4 text on black | 5.35:1 | AA | Lc -35.7 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C5DEEA
oklch(88.6% 0.031 228.2)
-
Step 300
300
#9BC9DD
oklch(81% 0.056 226.4)
-
Step 400
400
#5FACCD
oklch(70.8% 0.09 227.9)
-
Step 500
500 (this color)
#028BB4
oklch(59.4% 0.115 227.7)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#004960
oklch(37.8% 0.073 227.3)
-
Step 950
950
#052B39
oklch(27.1% 0.048 227.7)
#028BB4 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) | #7589B6 | 0.082 |
| Deuteranopia (no green cones) | #617AB3 | 0.071 |
| Tritanopia (no blue cones) | #009799 | 0.063 |
| Achromatopsia (no color) | #818181 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #028BB4
#028BB4
oklch(59.4% 0.115 227.7)
- #B5673D
#B5673D
oklch(59.4% 0.115 47.7)
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 #028BB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.004
- Teal Blue #01889F ΔE 0.032
- Steel Blue #4682B4 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.039
- Water Blue #0E87CC ΔE 0.042
- Off Blue #5684AE ΔE 0.047
- Nice Blue #107AB0 ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.050
Use #028BB4 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.