#428BAD
Closest named color: Dusty Blue (#5A86AD). oklch(60.4% 0.089 230.9), rgb(66, 139, 173).
Aa
Black text reads best on this color (5.52:1).
About this color
#428BAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.089 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.025 away. Black text reads best on it, at 5.52:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.52:1 |
| White text | 3.79:1 |
Values
| HEX | #428BAD |
| RGB | rgb(66, 139, 173) |
| HSL | hsl(199, 45%, 47%) |
| OKLCH | oklch(60.4% 0.089 230.9) |
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 #428BAD | 3.79:1 | AA large text | Lc -70.8 | Content text, not long reading |
| Black text on #428BAD | 5.52:1 | AA | Lc 38.8 | Non-text elements, placeholder text |
| #428BAD text on white | 3.79:1 | AA large text | Lc 65.3 | Content text, not long reading |
| #428BAD text on black | 5.52:1 | AA | Lc -36.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A5C6D8
oklch(80.8% 0.044 231.9)
-
Step 400
400
#73A9C4
oklch(70.7% 0.069 230.7)
-
Step 500
500 (this color)
#428BAD
oklch(60.4% 0.089 230.9)
-
Step 600
600
#287DA1
oklch(55.6% 0.096 230.6)
-
Step 700
700
#19698A
oklch(49% 0.09 231.1)
-
Step 800
800
#195670
oklch(42.7% 0.074 230.7)
-
Step 900
900
#1C475B
oklch(37.7% 0.058 231.3)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#428BAD 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) | #7A89AF | 0.061 |
| Deuteranopia (no green cones) | #6B7EAD | 0.053 |
| Tritanopia (no blue cones) | #009496 | 0.058 |
| Achromatopsia (no color) | #838383 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428BAD
#428BAD
oklch(60.4% 0.089 230.9)
- #AC724F
#AC724F
oklch(60.5% 0.089 51.5)
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 #428BAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.025
- Off Blue #5684AE ΔE 0.026
- Blue NCS #118AB2 ΔE 0.026
- Cool Blue #4984B8 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.031
- Teal Blue #01889F ΔE 0.040
- Faded Blue #658CBB ΔE 0.043
- Stormy Blue #507B9C ΔE 0.046
Use #428BAD 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.