#434F7E
Closest named color: Dusk (#4E5481). oklch(43.9% 0.079 271.9), rgb(67, 79, 126).
Aa
White text reads best on this color (7.89:1).
About this color
#434F7E is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.079 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 7.89:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.65:1 |
| White text | 7.89:1 |
Values
| HEX | #434F7E |
| RGB | rgb(67, 79, 126) |
| HSL | hsl(228, 31%, 38%) |
| OKLCH | oklch(43.9% 0.079 271.9) |
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 #434F7E | 7.89:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #434F7E | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #434F7E text on white | 7.89:1 | AAA | Lc 87.3 | Fine for body text |
| #434F7E text on black | 2.65:1 | Fails | Lc -14.8 | 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
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D3D9EB
oklch(88.6% 0.026 271.1)
-
Step 300
300
#B6BFDF
oklch(80.8% 0.046 272.9)
-
Step 400
400
#909ECF
oklch(70.6% 0.074 272.1)
-
Step 500
500
#7586C3
oklch(63.1% 0.094 271.6)
-
Step 600
600
#5E6FAF
oklch(55.6% 0.102 271.5)
-
Step 700
700
#4E5C97
oklch(49.1% 0.096 272.3)
-
Step 800
800 (this color)
#434F7E
oklch(43.9% 0.079 271.9)
-
Step 900
900
#363F62
oklch(37.6% 0.061 272.2)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#434F7E 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) | #3E5480 | 0.015 |
| Deuteranopia (no green cones) | #394F7D | 0.014 |
| Tritanopia (no blue cones) | #2E5960 | 0.072 |
| Achromatopsia (no color) | #515151 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434F7E
#434F7E
oklch(43.9% 0.079 271.9)
- #625015
#625015
oklch(43.8% 0.079 91.3)
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 #434F7E, 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 0.028
- Light Navy Blue #2E5A88 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- Dusty Grape #545775 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.042
- Light Navy #155084 ΔE 0.046
Use #434F7E 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.