#434C91
Closest named color: Twilight (#4E518B). oklch(44.5% 0.113 275.3), rgb(67, 76, 145).
Aa
White text reads best on this color (7.83:1).
About this color
#434C91 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.113 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.026 away. White text reads best on it, at 7.83:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #434C91 |
| RGB | rgb(67, 76, 145) |
| HSL | hsl(233, 37%, 42%) |
| OKLCH | oklch(44.5% 0.113 275.3) |
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 #434C91 | 7.83:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #434C91 | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #434C91 text on white | 7.83:1 | AAA | Lc 87.0 | Fine for body text |
| #434C91 text on black | 2.68:1 | Fails | Lc -15.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B4BEEC
oklch(80.9% 0.066 275.3)
-
Step 400
400
#8E9BE2
oklch(70.7% 0.105 275.4)
-
Step 500
500
#7381DA
oklch(63.2% 0.134 275.1)
-
Step 600
600
#5C68C7
oklch(55.5% 0.146 275.2)
-
Step 700
700
#4C56AC
oklch(49% 0.136 275.2)
-
Step 800
800 (this color)
#434C91
oklch(44.5% 0.113 275.3)
-
Step 900
900
#353C6F
oklch(37.7% 0.087 275.5)
-
Step 950
950
#1F2441
oklch(27.1% 0.054 274.8)
#434C91 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) | #2D5594 | 0.033 |
| Deuteranopia (no green cones) | #254F8F | 0.035 |
| Tritanopia (no blue cones) | #205B67 | 0.100 |
| Achromatopsia (no color) | #525252 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434C91
#434C91
oklch(44.5% 0.113 275.3)
- #645300
#645300
oklch(44.6% 0.092 95.3)
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 #434C91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.026
- Blueberry #464196 ΔE 0.031
- Dusk Blue #26538D ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.042
- Dusk #4E5481 ΔE 0.042
- Cobalt #1E488F ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.049
Use #434C91 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.