#334357
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.04 254.3), rgb(51, 67, 87).
Aa
White text reads best on this color (10.09:1).
About this color
#334357 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.040 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.015 away. White text reads best on it, at 10.09:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.09:1 |
Values
| HEX | #334357 |
| RGB | rgb(51, 67, 87) |
| HSL | hsl(213, 26%, 27%) |
| OKLCH | oklch(37.8% 0.04 254.3) |
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 #334357 | 10.09:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #334357 | 2.08:1 | Fails | Lc 10.5 | Not readable |
| #334357 text on white | 10.09:1 | AAA | Lc 93.4 | Preferred for body text |
| #334357 text on black | 2.08:1 | Fails | Lc -9.1 | 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 900.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400
#8CA3BF
oklch(70.7% 0.049 253.5)
-
Step 500
500
#708CAF
oklch(63.2% 0.062 254.3)
-
Step 600
600
#58759A
oklch(55.5% 0.067 254.8)
-
Step 700
700
#486384
oklch(49.2% 0.062 253.9)
-
Step 800
800
#3B506B
oklch(42.6% 0.052 255)
-
Step 900
900 (this color)
#334357
oklch(37.8% 0.04 254.3)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#334357 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) | #3C4458 | 0.014 |
| Deuteranopia (no green cones) | #374057 | 0.011 |
| Tritanopia (no blue cones) | #27474A | 0.034 |
| Achromatopsia (no color) | #424242 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334357
#334357
oklch(37.8% 0.04 254.3)
- #4F3F29
#4F3F29
oklch(37.9% 0.041 74.9)
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 #334357, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.015
- Charcoal #264653 ΔE 0.021
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.041
- Onyx #343A40 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Teal #014D4E ΔE 0.055
- Midnight Green #073B4C ΔE 0.057
Use #334357 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.