#42698B
Closest named color: Denim (#3B638C). oklch(50.6% 0.07 246.1), rgb(66, 105, 139).
Aa
White text reads best on this color (5.79:1).
About this color
#42698B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.070 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.021 away. White text reads best on it, at 5.79:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.62:1 |
| White text | 5.79:1 |
Values
| HEX | #42698B |
| RGB | rgb(66, 105, 139) |
| HSL | hsl(208, 36%, 40%) |
| OKLCH | oklch(50.6% 0.07 246.1) |
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 #42698B | 5.79:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #42698B | 3.62:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #42698B text on white | 5.79:1 | AA | Lc 78.9 | Fine for body text |
| #42698B text on black | 3.62:1 | AA large text | Lc -22.9 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE5
oklch(88.5% 0.019 243)
-
Step 300
300
#AFC3D6
oklch(80.8% 0.035 246.9)
-
Step 400
400
#85A5C1
oklch(70.8% 0.054 245.1)
-
Step 500
500
#668EB1
oklch(63.1% 0.069 245.6)
-
Step 600
600
#4D789D
oklch(55.7% 0.075 245.7)
-
Step 700
700 (this color)
#42698B
oklch(50.6% 0.07 246.1)
-
Step 800
800
#33526D
oklch(42.7% 0.058 246)
-
Step 900
900
#2D4458
oklch(37.7% 0.045 245.6)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#42698B 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) | #5B6A8D | 0.032 |
| Deuteranopia (no green cones) | #51628A | 0.025 |
| Tritanopia (no blue cones) | #1C7175 | 0.058 |
| Achromatopsia (no color) | #656565 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42698B
#42698B
oklch(50.6% 0.07 246.1)
- #815D38
#815D38
oklch(50.8% 0.07 65.9)
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 #42698B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.021
- Muted Blue #3B719F ΔE 0.034
- Metallic Blue #4F738E ΔE 0.035
- Dusky Blue #475F94 ΔE 0.036
- Slate #516572 ΔE 0.041
- Dull Blue #49759C ΔE 0.041
- Ocean Blue #03719C ΔE 0.043
- Sea Blue #047495 ΔE 0.043
Use #42698B 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.