#434D91
Closest named color: Twilight (#4E518B). oklch(44.7% 0.111 274.7), rgb(67, 77, 145).
Aa
White text reads best on this color (7.75:1).
About this color
#434D91 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.111 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.024 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #434D91 |
| RGB | rgb(67, 77, 145) |
| HSL | hsl(232, 37%, 42%) |
| OKLCH | oklch(44.7% 0.111 274.7) |
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 #434D91 | 7.75:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #434D91 | 2.70:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #434D91 text on white | 7.75:1 | AAA | Lc 86.8 | Fine for body text |
| #434D91 text on black | 2.70:1 | Fails | Lc -15.3 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
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
#B4BEEB
oklch(80.9% 0.065 275.1)
-
Step 400
400
#8D9BE1
oklch(70.6% 0.104 274.8)
-
Step 500
500
#7281D9
oklch(63.1% 0.133 274.6)
-
Step 600
600
#5C69C6
oklch(55.6% 0.144 274.8)
-
Step 700
700
#4C57AB
oklch(49.1% 0.133 274.8)
-
Step 800
800 (this color)
#434D91
oklch(44.7% 0.111 274.7)
-
Step 900
900
#343C6F
oklch(37.6% 0.087 274.7)
-
Step 950
950
#1F2441
oklch(27.1% 0.054 274.8)
#434D91 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) | #2F5694 | 0.031 |
| Deuteranopia (no green cones) | #274F90 | 0.033 |
| Tritanopia (no blue cones) | #205C68 | 0.098 |
| Achromatopsia (no color) | #535353 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434D91
#434D91
oklch(44.7% 0.111 274.7)
- #655300
#655300
oklch(44.7% 0.092 94.4)
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 #434D91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.024
- Blueberry #464196 ΔE 0.034
- Dusk Blue #26538D ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.039
- Dusk #4E5481 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.042
- Cobalt #1E488F ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.047
Use #434D91 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.