#42576D
Closest named color: YInMn Blue (#415A77). oklch(44.9% 0.045 250), rgb(66, 87, 109).
Aa
White text reads best on this color (7.45:1).
About this color
#42576D is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.045 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.017 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #42576D |
| RGB | rgb(66, 87, 109) |
| HSL | hsl(211, 25%, 34%) |
| OKLCH | oklch(44.9% 0.045 250) |
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 #42576D | 7.45:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #42576D | 2.81:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #42576D text on white | 7.45:1 | AAA | Lc 85.9 | Fine for body text |
| #42576D text on black | 2.81:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B4C2D1
oklch(80.8% 0.026 250)
-
Step 400
400
#8DA3BA
oklch(70.6% 0.042 249.6)
-
Step 500
500
#718CA9
oklch(63% 0.054 250.5)
-
Step 600
600
#597694
oklch(55.5% 0.058 249.8)
-
Step 700
700
#49637E
oklch(49% 0.054 249.9)
-
Step 800
800 (this color)
#42576D
oklch(44.9% 0.045 250)
-
Step 900
900
#344354
oklch(37.7% 0.035 251.9)
-
Step 950
950
#1E2731
oklch(26.9% 0.023 251.3)
#42576D 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) | #4F576E | 0.019 |
| Deuteranopia (no green cones) | #49536D | 0.015 |
| Tritanopia (no blue cones) | #345C5E | 0.038 |
| Achromatopsia (no color) | #555555 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42576D
#42576D
oklch(44.9% 0.045 250)
- #65513A
#65513A
oklch(44.9% 0.044 70.2)
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 #42576D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.017
- Dusty Grape #545775 ΔE 0.030
- Dusk #4E5481 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.047
- Slate #516572 ΔE 0.049
- Petrol #005F6A ΔE 0.052
- Denim #3B638C ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.059
Use #42576D 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.