#334B59
Closest named color: Dark Grey Blue (#29465B). oklch(39.9% 0.038 234.6), rgb(51, 75, 89).
Aa
White text reads best on this color (9.16:1).
About this color
#334B59 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.038 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.023 away. White text reads best on it, at 9.16:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #334B59 |
| RGB | rgb(51, 75, 89) |
| HSL | hsl(202, 27%, 27%) |
| OKLCH | oklch(39.9% 0.038 234.6) |
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 #334B59 | 9.16:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #334B59 | 2.29:1 | Fails | Lc 12.9 | Not readable |
| #334B59 text on white | 9.16:1 | AAA | Lc 91.1 | Preferred for body text |
| #334B59 text on black | 2.29:1 | Fails | Lc -11.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D1
oklch(80.9% 0.029 236.3)
-
Step 400
400
#86A6B9
oklch(70.8% 0.045 234.3)
-
Step 500
500
#6790A8
oklch(63.2% 0.058 234.6)
-
Step 600
600
#4D7A93
oklch(55.7% 0.063 233.8)
-
Step 700
700
#3E667D
oklch(49% 0.058 234.9)
-
Step 800
800
#335366
oklch(42.6% 0.049 235.7)
-
Step 900
900 (this color)
#334B59
oklch(39.9% 0.038 234.6)
-
Step 950
950
#1B2831
oklch(26.9% 0.025 239.1)
#334B59 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) | #444A5A | 0.024 |
| Deuteranopia (no green cones) | #3F4659 | 0.022 |
| Tritanopia (no blue cones) | #254F4F | 0.030 |
| Achromatopsia (no color) | #484848 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334B59
#334B59
oklch(39.9% 0.038 234.6)
- #584234
#584234
oklch(39.9% 0.038 53.8)
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 #334B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.023
- Charcoal #264653 ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.025
- Charcoal Grey #3C4142 ΔE 0.042
- Deep Teal #00555A ΔE 0.044
- Dark Teal #014D4E ΔE 0.046
- Dark Blue Green #005249 ΔE 0.056
- Onyx #343A40 ΔE 0.060
Use #334B59 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.