#428BA1
Closest named color: Teal Blue (#01889F). oklch(59.9% 0.08 220.3), rgb(66, 139, 161).
Aa
Black text reads best on this color (5.43:1).
About this color
#428BA1 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.080 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.032 away. Black text reads best on it, at 5.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.43:1 |
| White text | 3.86:1 |
Values
| HEX | #428BA1 |
| RGB | rgb(66, 139, 161) |
| HSL | hsl(194, 42%, 45%) |
| OKLCH | oklch(59.9% 0.08 220.3) |
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 #428BA1 | 3.86:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #428BA1 | 5.43:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #428BA1 text on white | 3.86:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #428BA1 text on black | 5.43:1 | AA | Lc -35.8 | 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
#74AABC
oklch(70.7% 0.062 220.8)
-
Step 500
500 (this color)
#428BA1
oklch(59.9% 0.08 220.3)
-
Step 600
600
#2A7F96
oklch(55.6% 0.086 219.6)
-
Step 700
700
#1B6B80
oklch(49.1% 0.08 219.8)
-
Step 800
800
#1A5768
oklch(42.6% 0.066 220.3)
-
Step 900
900
#1D4855
oklch(37.7% 0.052 220.6)
-
Step 950
950
#122A32
oklch(26.9% 0.033 222)
#428BA1 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) | #7E88A2 | 0.067 |
| Deuteranopia (no green cones) | #707DA1 | 0.061 |
| Tritanopia (no blue cones) | #009292 | 0.046 |
| Achromatopsia (no color) | #828282 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428BA1
#428BA1
oklch(59.9% 0.08 220.3)
- #A9705B
#A9705B
oklch(60% 0.079 41)
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 #428BA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.032
- Blue NCS #118AB2 ΔE 0.035
- Dusty Blue #5A86AD ΔE 0.036
- Off Blue #5684AE ΔE 0.038
- Teal Green #0A9396 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.045
- Stormy Blue #507B9C ΔE 0.046
- Cerulean #457B9D ΔE 0.046
Use #428BA1 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.