#434D8B
Closest named color: Twilight (#4E518B). oklch(44.3% 0.102 274.6), rgb(67, 77, 139).
Aa
White text reads best on this color (7.85:1).
About this color
#434D8B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.102 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.021 away. White text reads best on it, at 7.85:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.67:1 |
| White text | 7.85:1 |
Values
| HEX | #434D8B |
| RGB | rgb(67, 77, 139) |
| HSL | hsl(232, 35%, 40%) |
| OKLCH | oklch(44.3% 0.102 274.6) |
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 #434D8B | 7.85:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #434D8B | 2.67:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #434D8B text on white | 7.85:1 | AAA | Lc 87.1 | Fine for body text |
| #434D8B text on black | 2.67:1 | Fails | Lc -15.0 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B5BEE8
oklch(80.9% 0.06 275.5)
-
Step 400
400
#8F9CDC
oklch(70.7% 0.095 274.9)
-
Step 500
500
#7482D3
oklch(63.1% 0.123 274.9)
-
Step 600
600
#5D6AC0
oklch(55.5% 0.133 274.7)
-
Step 700
700
#4D58A6
oklch(49.1% 0.124 274.8)
-
Step 800
800 (this color)
#434D8B
oklch(44.3% 0.102 274.6)
-
Step 900
900
#353D6B
oklch(37.6% 0.079 274.5)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#434D8B 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) | #34558D | 0.027 |
| Deuteranopia (no green cones) | #2C4F8A | 0.028 |
| Tritanopia (no blue cones) | #255A65 | 0.090 |
| Achromatopsia (no color) | #525252 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434D8B
#434D8B
oklch(44.3% 0.102 274.6)
- #635200
#635200
oklch(44.3% 0.091 95.1)
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 #434D8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.021
- Dusk #4E5481 ΔE 0.034
- Dusk Blue #26538D ΔE 0.035
- Blueberry #464196 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.043
- Cobalt #1E488F ΔE 0.047
Use #434D8B 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.