#42679D
Closest named color: Dusky Blue (#475F94). oklch(51.1% 0.096 257.8), rgb(66, 103, 157).
Aa
White text reads best on this color (5.73:1).
About this color
#42679D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.096 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.024 away. White text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.65:1 |
| White text | 5.73:1 |
Values
| HEX | #42679D |
| RGB | rgb(66, 103, 157) |
| HSL | hsl(216, 41%, 44%) |
| OKLCH | oklch(51.1% 0.096 257.8) |
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 #42679D | 5.73:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #42679D | 3.65:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #42679D text on white | 5.73:1 | AA | Lc 78.6 | Fine for body text |
| #42679D text on black | 3.65:1 | AA large text | Lc -23.2 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AEC2DF
oklch(80.8% 0.047 257.6)
-
Step 400
400
#84A2CF
oklch(70.6% 0.074 258.3)
-
Step 500
500
#658BC3
oklch(63.2% 0.095 257.9)
-
Step 600
600
#4B74AF
oklch(55.6% 0.103 257.5)
-
Step 700
700 (this color)
#42679D
oklch(51.1% 0.096 257.8)
-
Step 800
800
#324F7A
oklch(42.6% 0.08 258.1)
-
Step 900
900
#2C4262
oklch(37.6% 0.062 257.7)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#42679D 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) | #516B9F | 0.023 |
| Deuteranopia (no green cones) | #45629C | 0.014 |
| Tritanopia (no blue cones) | #00737B | 0.084 |
| Achromatopsia (no color) | #666666 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42679D
#42679D
oklch(51.1% 0.096 257.8)
- #855E19
#855E19
oklch(51.1% 0.096 76.9)
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 #42679D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.024
- French Blue #436BAD ΔE 0.026
- Muted Blue #3B719F ΔE 0.028
- Denim #3B638C ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.038
- Mid Blue #276AB3 ΔE 0.039
- Dull Blue #49759C ΔE 0.044
Use #42679D 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.