#428EB2
Closest named color: Dusty Blue (#5A86AD). oklch(61.4% 0.092 231.5), rgb(66, 142, 178).
Aa
Black text reads best on this color (5.74:1).
About this color
#428EB2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.092 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.028 away. Black text reads best on it, at 5.74:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.74:1 |
| White text | 3.65:1 |
Values
| HEX | #428EB2 |
| RGB | rgb(66, 142, 178) |
| HSL | hsl(199, 46%, 48%) |
| OKLCH | oklch(61.4% 0.092 231.5) |
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 #428EB2 | 3.65:1 | AA large text | Lc -69.4 | Content text, not long reading |
| Black text on #428EB2 | 5.74:1 | AA | Lc 40.1 | Non-text elements, placeholder text |
| #428EB2 text on white | 3.65:1 | AA large text | Lc 63.9 | Content text, not long reading |
| #428EB2 text on black | 5.74:1 | AA | Lc -37.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C6D9
oklch(80.8% 0.045 232.5)
-
Step 400
400
#71A9C6
oklch(70.7% 0.072 231.7)
-
Step 500
500 (this color)
#428EB2
oklch(61.4% 0.092 231.5)
-
Step 600
600
#237DA4
oklch(55.6% 0.101 231.9)
-
Step 700
700
#13698C
oklch(49% 0.094 231.8)
-
Step 800
800
#155672
oklch(42.7% 0.078 231.8)
-
Step 900
900
#1A475C
oklch(37.7% 0.06 231.8)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#428EB2 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) | #7C8CB4 | 0.063 |
| Deuteranopia (no green cones) | #6C81B1 | 0.053 |
| Tritanopia (no blue cones) | #00989A | 0.061 |
| Achromatopsia (no color) | #868686 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428EB2
#428EB2
oklch(61.4% 0.092 231.5)
- #B1744F
#B1744F
oklch(61.5% 0.093 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 #428EB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.028
- Blue NCS #118AB2 ΔE 0.030
- Off Blue #5684AE ΔE 0.031
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.036
- Faded Blue #658CBB ΔE 0.039
- Teal Blue #01889F ΔE 0.047
- Blue Grey #758DA3 ΔE 0.055
Use #428EB2 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.