#334F99
Closest named color: Dusk Blue (#26538D). oklch(44.6% 0.125 265.9), rgb(51, 79, 153).
Aa
White text reads best on this color (7.72:1).
About this color
#334F99 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.125 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.027 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #334F99 |
| RGB | rgb(51, 79, 153) |
| HSL | hsl(224, 50%, 40%) |
| OKLCH | oklch(44.6% 0.125 265.9) |
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 #334F99 | 7.72:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #334F99 | 2.71:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #334F99 text on white | 7.72:1 | AAA | Lc 86.5 | Fine for body text |
| #334F99 text on black | 2.71:1 | Fails | Lc -15.5 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#AAC0F1
oklch(80.8% 0.074 265.9)
-
Step 400
400
#7E9EEA
oklch(70.7% 0.118 266.1)
-
Step 500
500
#5E84E3
oklch(63% 0.149 265.9)
-
Step 600
600
#466CD1
oklch(55.7% 0.162 265.9)
-
Step 700
700
#3759B5
oklch(49% 0.151 265.8)
-
Step 800
800 (this color)
#334F99
oklch(44.6% 0.125 265.9)
-
Step 900
900
#293E75
oklch(37.7% 0.098 266.1)
-
Step 950
950
#182545
oklch(27.1% 0.062 265.8)
#334F99 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) | #29589C | 0.025 |
| Deuteranopia (no green cones) | #144E97 | 0.027 |
| Tritanopia (no blue cones) | #00606C | 0.105 |
| Achromatopsia (no color) | #535353 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334F99
#334F99
oklch(44.6% 0.125 265.9)
- #6B5000
#6B5000
oklch(44.7% 0.092 86.1)
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 #334F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.027
- Cobalt #1E488F ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.040
- Blueberry #464196 ΔE 0.041
- Twilight #4E518B ΔE 0.043
- Light Navy #155084 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.054
Use #334F99 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.