#42709E
Closest named color: Muted Blue (#3B719F). oklch(53.3% 0.089 249.8), rgb(66, 112, 158).
Aa
White text reads best on this color (5.19:1).
About this color
#42709E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.089 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.007 away. White text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #42709E |
| RGB | rgb(66, 112, 158) |
| HSL | hsl(210, 41%, 44%) |
| OKLCH | oklch(53.3% 0.089 249.8) |
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 #42709E | 5.19:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #42709E | 4.04:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #42709E text on white | 5.19:1 | AA | Lc 75.6 | Fine for body text |
| #42709E text on black | 4.04:1 | AA large text | Lc -26.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#AEC3DA
oklch(80.9% 0.04 250.7)
-
Step 400
400
#82A4C7
oklch(70.6% 0.064 249.5)
-
Step 500
500
#628DB9
oklch(63% 0.082 249.8)
-
Step 600
600 (this color)
#42709E
oklch(53.3% 0.089 249.8)
-
Step 700
700
#3A648E
oklch(49.2% 0.083 249.8)
-
Step 800
800
#305273
oklch(42.8% 0.068 249)
-
Step 900
900
#2B445D
oklch(37.8% 0.053 249.4)
-
Step 950
950
#192836
oklch(27% 0.033 247.4)
#42709E 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) | #5D72A0 | 0.033 |
| Deuteranopia (no green cones) | #51699D | 0.024 |
| Tritanopia (no blue cones) | #007B80 | 0.076 |
| Achromatopsia (no color) | #6D6D6D | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42709E
#42709E
oklch(53.3% 0.089 249.8)
- #8D632D
#8D632D
oklch(53.3% 0.089 70.6)
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 #42709E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.007
- Flat Blue #3C73A8 ΔE 0.016
- Dull Blue #49759C ΔE 0.018
- French Blue #436BAD ΔE 0.031
- Metallic Blue #4F738E ΔE 0.032
- Cerulean #457B9D ΔE 0.034
- Ocean Blue #03719C ΔE 0.036
- Stormy Blue #507B9C ΔE 0.039
Use #42709E 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.