#42728E
Closest named color: Metallic Blue (#4F738E). oklch(53% 0.068 235.7), rgb(66, 114, 142).
Aa
White text reads best on this color (5.21:1).
About this color
#42728E is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.068 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.015 away. White text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.02:1 |
| White text | 5.21:1 |
Values
| HEX | #42728E |
| RGB | rgb(66, 114, 142) |
| HSL | hsl(202, 37%, 41%) |
| OKLCH | oklch(53% 0.068 235.7) |
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 #42728E | 5.21:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #42728E | 4.02:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #42728E text on white | 5.21:1 | AA | Lc 75.7 | Fine for body text |
| #42728E text on black | 4.02:1 | AA large text | Lc -26.0 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D2
oklch(80.8% 0.031 235.7)
-
Step 400
400
#83A6BB
oklch(70.6% 0.049 234.7)
-
Step 500
500
#6490AB
oklch(63.2% 0.063 236.1)
-
Step 600
600 (this color)
#42728E
oklch(53% 0.068 235.7)
-
Step 700
700
#3B6680
oklch(49% 0.064 236.6)
-
Step 800
800
#315468
oklch(42.8% 0.052 234.9)
-
Step 900
900
#2B4555
oklch(37.6% 0.042 236.5)
-
Step 950
950
#1A2931
oklch(27.1% 0.025 232.2)
#42728E 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) | #65718F | 0.043 |
| Deuteranopia (no green cones) | #5A698E | 0.037 |
| Tritanopia (no blue cones) | #14797B | 0.053 |
| Achromatopsia (no color) | #6D6D6D | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42728E
#42728E
oklch(53% 0.068 235.7)
- #8A6144
#8A6144
oklch(52.9% 0.068 55.9)
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 #42728E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.015
- Dull Blue #49759C ΔE 0.024
- Muted Blue #3B719F ΔE 0.029
- Cerulean #457B9D ΔE 0.032
- Sea Blue #047495 ΔE 0.035
- Stormy Blue #507B9C ΔE 0.036
- Ocean #017B92 ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.041
Use #42728E 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.