#42547A
Closest named color: YInMn Blue (#415A77). oklch(44.8% 0.067 264.4), rgb(66, 84, 122).
Aa
White text reads best on this color (7.55:1).
About this color
#42547A is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.067 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.020 away. White text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.78:1 |
| White text | 7.55:1 |
Values
| HEX | #42547A |
| RGB | rgb(66, 84, 122) |
| HSL | hsl(221, 30%, 37%) |
| OKLCH | oklch(44.8% 0.067 264.4) |
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 #42547A | 7.55:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #42547A | 2.78:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #42547A text on white | 7.55:1 | AAA | Lc 86.2 | Fine for body text |
| #42547A text on black | 2.78:1 | Fails | Lc -15.9 | 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 800.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DB
oklch(80.9% 0.039 264.3)
-
Step 400
400
#8DA1C8
oklch(70.7% 0.062 263.6)
-
Step 500
500
#7189BA
oklch(63.1% 0.079 264.1)
-
Step 600
600
#5A72A6
oklch(55.5% 0.086 264.8)
-
Step 700
700
#4A608F
oklch(49.2% 0.08 264.5)
-
Step 800
800 (this color)
#42547A
oklch(44.8% 0.067 264.4)
-
Step 900
900
#34415D
oklch(37.7% 0.051 264.9)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#42547A 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) | #46577C | 0.011 |
| Deuteranopia (no green cones) | #405279 | 0.007 |
| Tritanopia (no blue cones) | #2E5C61 | 0.060 |
| Achromatopsia (no color) | #545454 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42547A
#42547A
oklch(44.8% 0.067 264.4)
- #665126
#665126
oklch(44.7% 0.066 83.5)
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 #42547A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.020
- Dusk #4E5481 ΔE 0.021
- Dusty Grape #545775 ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.031
- Twilight #4E518B ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.040
- Dusk Blue #26538D ΔE 0.044
- Denim #3B638C ΔE 0.047
Use #42547A 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.