#34404F
Closest named color: Charcoal (#264653). oklch(36.7% 0.03 254.2), rgb(52, 64, 79).
Aa
White text reads best on this color (10.54:1).
About this color
#34404F is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.030 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.024 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #34404F |
| RGB | rgb(52, 64, 79) |
| HSL | hsl(213, 21%, 26%) |
| OKLCH | oklch(36.7% 0.03 254.2) |
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 #34404F | 10.54:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #34404F | 1.99:1 | Fails | Lc 9.5 | Not readable |
| #34404F text on white | 10.54:1 | AAA | Lc 94.5 | Preferred for body text |
| #34404F text on black | 1.99:1 | Fails | Lc -8.1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE2
oklch(88.6% 0.013 255.5)
-
Step 300
300
#B7C2CF
oklch(81% 0.022 252.5)
-
Step 400
400
#91A2B7
oklch(70.6% 0.036 253.8)
-
Step 500
500
#768BA6
oklch(63% 0.048 254.8)
-
Step 600
600
#5F7591
oklch(55.6% 0.051 254.7)
-
Step 700
700
#4E627B
oklch(49% 0.047 254.3)
-
Step 800
800
#405064
oklch(42.6% 0.039 254.2)
-
Step 900
900 (this color)
#34404F
oklch(36.7% 0.03 254.2)
-
Step 950
950
#202730
oklch(27% 0.02 254.8)
#34404F 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) | #3B4050 | 0.011 |
| Deuteranopia (no green cones) | #383E4F | 0.008 |
| Tritanopia (no blue cones) | #2C4345 | 0.026 |
| Achromatopsia (no color) | #3F3F3F | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34404F
#34404F
oklch(36.7% 0.03 254.2)
- #493D2D
#493D2D
oklch(36.8% 0.031 74.6)
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 #34404F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.024
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.026
- Onyx #343A40 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.049
- Midnight Green #073B4C ΔE 0.052
- Gunmetal #293241 ΔE 0.052
Use #34404F 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.