#434A73
Closest named color: Dusk (#4E5481). oklch(42.2% 0.069 275.7), rgb(67, 74, 115).
Aa
White text reads best on this color (8.51:1).
About this color
#434A73 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.069 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.039 away. White text reads best on it, at 8.51:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #434A73 |
| RGB | rgb(67, 74, 115) |
| HSL | hsl(231, 26%, 36%) |
| OKLCH | oklch(42.2% 0.069 275.7) |
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 #434A73 | 8.51:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #434A73 | 2.46:1 | Fails | Lc 14.7 | Not readable |
| #434A73 text on white | 8.51:1 | AAA | Lc 89.3 | Fine for body text |
| #434A73 text on black | 2.46:1 | Fails | Lc -13.0 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D5D8E8
oklch(88.5% 0.022 277.5)
-
Step 300
300
#B9BFDB
oklch(80.9% 0.04 275.9)
-
Step 400
400
#959EC9
oklch(70.7% 0.064 275.4)
-
Step 500
500
#7B85BB
oklch(63% 0.082 275.7)
-
Step 600
600
#656EA8
oklch(55.5% 0.091 276.3)
-
Step 700
700
#545C90
oklch(49.1% 0.084 276.2)
-
Step 800
800 (this color)
#434A73
oklch(42.2% 0.069 275.7)
-
Step 900
900
#393F5E
oklch(37.6% 0.054 275.1)
-
Step 950
950
#222537
oklch(27% 0.034 276.6)
#434A73 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) | #3C4F75 | 0.016 |
| Deuteranopia (no green cones) | #394B72 | 0.014 |
| Tritanopia (no blue cones) | #345259 | 0.061 |
| Achromatopsia (no color) | #4D4D4D | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434A73
#434A73
oklch(42.2% 0.069 275.7)
- #594D1C
#594D1C
oklch(42.1% 0.069 95.5)
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 #434A73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.039
- Twilight #4E518B ΔE 0.046
- YInMn Blue #415A77 ΔE 0.047
- Dusty Grape #545775 ΔE 0.049
- Light Navy #155084 ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.057
Use #434A73 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.