#434F80
Closest named color: Dusk (#4E5481). oklch(44% 0.082 272.2), rgb(67, 79, 128).
Aa
White text reads best on this color (7.86:1).
About this color
#434F80 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.082 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.023 away. White text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.66:1 |
| White text | 7.86:1 |
Values
| HEX | #434F80 |
| RGB | rgb(67, 79, 128) |
| HSL | hsl(228, 31%, 38%) |
| OKLCH | oklch(44% 0.082 272.2) |
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 #434F80 | 7.86:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #434F80 | 2.66:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #434F80 text on white | 7.86:1 | AAA | Lc 87.2 | Fine for body text |
| #434F80 text on black | 2.66:1 | Fails | Lc -14.9 | Not readable |
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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F3
oklch(93.5% 0.014 272.7)
-
Step 200
200
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B5BFE1
oklch(80.8% 0.049 272.4)
-
Step 400
400
#909ED1
oklch(70.7% 0.077 272.4)
-
Step 500
500
#7585C5
oklch(63% 0.098 272.6)
-
Step 600
600
#5E6EB2
oklch(55.6% 0.107 272.5)
-
Step 700
700
#4D5C99
oklch(49.1% 0.1 271.9)
-
Step 800
800 (this color)
#434F80
oklch(44% 0.082 272.2)
-
Step 900
900
#363F64
oklch(37.7% 0.065 272.6)
-
Step 950
950
#1F253A
oklch(26.9% 0.04 271.3)
#434F80 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) | #3D5482 | 0.015 |
| Deuteranopia (no green cones) | #374F7F | 0.016 |
| Tritanopia (no blue cones) | #2D5961 | 0.073 |
| Achromatopsia (no color) | #525252 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434F80
#434F80
oklch(44% 0.082 272.2)
- #635111
#635111
oklch(44.1% 0.082 92.2)
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 #434F80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.023
- Twilight #4E518B ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.037
- Dusk Blue #26538D ΔE 0.037
- YInMn Blue #415A77 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.040
- Dusty Grape #545775 ΔE 0.043
- Light Navy #155084 ΔE 0.046
Use #434F80 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.