#334757
Closest named color: Dark Grey Blue (#29465B). oklch(38.8% 0.037 243), rgb(51, 71, 87).
Aa
White text reads best on this color (9.63:1).
About this color
#334757 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.037 and its hue 243°. 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 9.63:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #334757 |
| RGB | rgb(51, 71, 87) |
| HSL | hsl(207, 26%, 27%) |
| OKLCH | oklch(38.8% 0.037 243) |
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 #334757 | 9.63:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #334757 | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #334757 text on white | 9.63:1 | AAA | Lc 92.3 | Preferred for body text |
| #334757 text on black | 2.17:1 | Fails | Lc -10.1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D1DBE3
oklch(88.6% 0.015 241.8)
-
Step 300
300
#B2C3D2
oklch(80.9% 0.028 244.8)
-
Step 400
400
#89A4BB
oklch(70.6% 0.045 244.2)
-
Step 500
500
#6B8EAA
oklch(63.1% 0.058 242.9)
-
Step 600
600
#537895
oklch(55.7% 0.062 242.8)
-
Step 700
700
#43657F
oklch(49.2% 0.057 242.3)
-
Step 800
800
#385267
oklch(42.7% 0.047 243.5)
-
Step 900
900 (this color)
#334757
oklch(38.8% 0.037 243)
-
Step 950
950
#1C2831
oklch(27% 0.024 241.1)
#334757 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) | #404758 | 0.019 |
| Deuteranopia (no green cones) | #3C4357 | 0.017 |
| Tritanopia (no blue cones) | #264B4C | 0.031 |
| Achromatopsia (no color) | #454545 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334757
#334757
oklch(38.8% 0.037 243)
- #534030
#534030
oklch(38.7% 0.037 61.5)
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 #334757, 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 0.019
- Dark Slate Gray #2F4F4F ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Teal #014D4E ΔE 0.048
- Onyx #343A40 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.050
- Deep Teal #00555A ΔE 0.053
Use #334757 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.