#428EA8
Closest named color: Dusty Blue (#5A86AD). oklch(60.9% 0.084 223.3), rgb(66, 142, 168).
Aa
Black text reads best on this color (5.66:1).
About this color
#428EA8 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.084 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.033 away. Black text reads best on it, at 5.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #428EA8 |
| RGB | rgb(66, 142, 168) |
| HSL | hsl(195, 44%, 46%) |
| OKLCH | oklch(60.9% 0.084 223.3) |
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 #428EA8 | 3.70:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #428EA8 | 5.66:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #428EA8 text on white | 3.70:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #428EA8 text on black | 5.66:1 | AA | Lc -37.2 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D4
oklch(80.9% 0.041 223)
-
Step 400
400
#72AABF
oklch(70.7% 0.066 223.5)
-
Step 500
500 (this color)
#428EA8
oklch(60.9% 0.084 223.3)
-
Step 600
600
#257F9A
oklch(55.7% 0.091 222.5)
-
Step 700
700
#156B84
oklch(49.2% 0.085 223)
-
Step 800
800
#16576B
oklch(42.7% 0.071 223.1)
-
Step 900
900
#1B4857
oklch(37.7% 0.055 223.2)
-
Step 950
950
#112A33
oklch(26.9% 0.035 224)
#428EA8 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) | #7F8BA9 | 0.067 |
| Deuteranopia (no green cones) | #7080A8 | 0.059 |
| Tritanopia (no blue cones) | #009696 | 0.050 |
| Achromatopsia (no color) | #858585 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428EA8
#428EA8
oklch(60.9% 0.084 223.3)
- #AE7259
#AE7259
oklch(60.9% 0.085 43.4)
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 #428EA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.033
- Blue NCS #118AB2 ΔE 0.034
- Off Blue #5684AE ΔE 0.036
- Teal Blue #01889F ΔE 0.039
- Cool Blue #4984B8 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.044
- Teal Green #0A9396 ΔE 0.045
- Faded Blue #658CBB ΔE 0.049
Use #428EA8 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.