#334B9D
Closest named color: Cobalt (#1E488F). oklch(44.1% 0.136 268.1), rgb(51, 75, 157).
Aa
White text reads best on this color (7.97:1).
About this color
#334B9D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.136 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.034 away. White text reads best on it, at 7.97:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #334B9D |
| RGB | rgb(51, 75, 157) |
| HSL | hsl(226, 51%, 41%) |
| OKLCH | oklch(44.1% 0.136 268.1) |
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 #334B9D | 7.97:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #334B9D | 2.63:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #334B9D text on white | 7.97:1 | AAA | Lc 87.3 | Fine for body text |
| #334B9D text on black | 2.63:1 | Fails | Lc -14.8 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#ABBFF5
oklch(80.9% 0.08 268.8)
-
Step 400
400
#7F9DF0
oklch(70.8% 0.127 268)
-
Step 500
500
#6082EB
oklch(63.2% 0.162 268.1)
-
Step 600
600
#4868D9
oklch(55.5% 0.177 268.2)
-
Step 700
700
#3A56BD
oklch(49.2% 0.165 268.2)
-
Step 800
800 (this color)
#334B9D
oklch(44.1% 0.136 268.1)
-
Step 900
900
#2A3C79
oklch(37.6% 0.106 268.5)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#334B9D 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) | #1A56A0 | 0.033 |
| Deuteranopia (no green cones) | #004C9B | 0.034 |
| Tritanopia (no blue cones) | #005E6C | 0.113 |
| Achromatopsia (no color) | #515151 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334B9D
#334B9D
oklch(44.1% 0.136 268.1)
- #674F00
#674F00
oklch(44% 0.09 88.4)
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 #334B9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.034
- Blueberry #464196 ΔE 0.034
- Dusk Blue #26538D ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.050
- Twilight #4E518B ΔE 0.052
- Light Navy #155084 ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.053
- Sapphire #2138AB ΔE 0.059
Use #334B9D 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.