#42678F
Closest named color: Denim (#3B638C). oklch(50.4% 0.077 251.4), rgb(66, 103, 143).
Aa
White text reads best on this color (5.88:1).
About this color
#42678F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.077 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.015 away. White text reads best on it, at 5.88:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #42678F |
| RGB | rgb(66, 103, 143) |
| HSL | hsl(211, 37%, 41%) |
| OKLCH | oklch(50.4% 0.077 251.4) |
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 #42678F | 5.88:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #42678F | 3.56:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #42678F text on white | 5.88:1 | AA | Lc 79.3 | Fine for body text |
| #42678F text on black | 3.56:1 | AA large text | Lc -22.5 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#B0C3D9
oklch(81% 0.037 252.1)
-
Step 400
400
#86A4C5
oklch(70.8% 0.059 251.1)
-
Step 500
500
#678DB6
oklch(63.1% 0.075 250.9)
-
Step 600
600
#4E76A2
oklch(55.5% 0.082 251.7)
-
Step 700
700 (this color)
#42678F
oklch(50.4% 0.077 251.4)
-
Step 800
800
#345171
oklch(42.7% 0.064 251.8)
-
Step 900
900
#2D435B
oklch(37.6% 0.05 251.3)
-
Step 950
950
#1B2835
oklch(27.1% 0.03 249)
#42678F 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) | #576991 | 0.028 |
| Deuteranopia (no green cones) | #4D618E | 0.020 |
| Tritanopia (no blue cones) | #187075 | 0.066 |
| Achromatopsia (no color) | #646464 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42678F
#42678F
oklch(50.4% 0.077 251.4)
- #805D2F
#805D2F
oklch(50.5% 0.077 72)
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 #42678F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.015
- Dusky Blue #475F94 ΔE 0.027
- Muted Blue #3B719F ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.039
- Peacock Blue #016795 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.041
- Ocean Blue #03719C ΔE 0.043
- Dull Blue #49759C ΔE 0.044
Use #42678F 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.