#334A8D
Closest named color: Cobalt (#1E488F). oklch(42.7% 0.114 267.2), rgb(51, 74, 141).
Aa
White text reads best on this color (8.38:1).
About this color
#334A8D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.114 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 8.38:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.38:1 |
Values
| HEX | #334A8D |
| RGB | rgb(51, 74, 141) |
| HSL | hsl(225, 47%, 38%) |
| OKLCH | oklch(42.7% 0.114 267.2) |
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 #334A8D | 8.38:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #334A8D | 2.50:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #334A8D text on white | 8.38:1 | AAA | Lc 88.7 | Fine for body text |
| #334A8D text on black | 2.50:1 | Fails | Lc -13.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#ADC0ED
oklch(80.9% 0.067 267)
-
Step 400
400
#839EE4
oklch(70.7% 0.107 267.5)
-
Step 500
500
#6585DC
oklch(63.2% 0.136 267.2)
-
Step 600
600
#4D6CC9
oklch(55.5% 0.148 267.6)
-
Step 700
700
#3E5AAE
oklch(49.1% 0.138 267.3)
-
Step 800
800 (this color)
#334A8D
oklch(42.7% 0.114 267.2)
-
Step 900
900
#2C3E71
oklch(37.6% 0.09 267.3)
-
Step 950
950
#1A2542
oklch(27% 0.056 266.9)
#334A8D 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) | #295290 | 0.023 |
| Deuteranopia (no green cones) | #1A4A8C | 0.024 |
| Tritanopia (no blue cones) | #005964 | 0.098 |
| Achromatopsia (no color) | #4E4E4E | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334A8D
#334A8D
oklch(42.7% 0.114 267.2)
- #634B00
#634B00
oklch(42.6% 0.087 87.5)
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 #334A8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Dusk Blue #26538D ΔE 0.027
- Light Navy #155084 ΔE 0.035
- Blueberry #464196 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.042
- Twilight #4E518B ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.049
Use #334A8D 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.