#428CA1
Closest named color: Teal Blue (#01889F). oklch(60.1% 0.08 219), rgb(66, 140, 161).
Aa
Black text reads best on this color (5.49:1).
About this color
#428CA1 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.080 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.034 away. Black text reads best on it, at 5.49:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.49:1 |
| White text | 3.81:1 |
Values
| HEX | #428CA1 |
| RGB | rgb(66, 140, 161) |
| HSL | hsl(193, 42%, 45%) |
| OKLCH | oklch(60.1% 0.08 219) |
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 #428CA1 | 3.81:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #428CA1 | 5.49:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #428CA1 text on white | 3.81:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #428CA1 text on black | 5.49:1 | AA | Lc -36.2 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE3
oklch(88.5% 0.022 218.6)
-
Step 300
300
#A6C7D2
oklch(80.9% 0.039 220)
-
Step 400
400
#74AABB
oklch(70.6% 0.062 219.6)
-
Step 500
500 (this color)
#428CA1
oklch(60.1% 0.08 219)
-
Step 600
600
#297F96
oklch(55.6% 0.087 219.4)
-
Step 700
700
#1A6B80
oklch(49.1% 0.081 219.7)
-
Step 800
800
#195768
oklch(42.6% 0.067 220)
-
Step 900
900
#1C4854
oklch(37.6% 0.052 218.6)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#428CA1 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) | #7F88A2 | 0.068 |
| Deuteranopia (no green cones) | #717EA1 | 0.061 |
| Tritanopia (no blue cones) | #009393 | 0.044 |
| Achromatopsia (no color) | #828282 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428CA1
#428CA1
oklch(60.1% 0.08 219)
- #AA705D
#AA705D
oklch(60.1% 0.08 38.9)
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 #428CA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.034
- Blue NCS #118AB2 ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.037
- Off Blue #5684AE ΔE 0.039
- Teal Green #0A9396 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.047
- Stormy Blue #507B9C ΔE 0.048
- Dark Cyan #008B8B ΔE 0.049
Use #428CA1 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.