#3B4E63
Closest named color: Dark Grey Blue (#29465B). oklch(41.7% 0.043 251.4), rgb(59, 78, 99).
Aa
White text reads best on this color (8.55:1).
About this color
#3B4E63 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.043 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 8.55:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #3B4E63 |
| RGB | rgb(59, 78, 99) |
| HSL | hsl(212, 25%, 31%) |
| OKLCH | oklch(41.7% 0.043 251.4) |
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 #3B4E63 | 8.55:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #3B4E63 | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #3B4E63 text on white | 8.55:1 | AAA | Lc 89.4 | Fine for body text |
| #3B4E63 text on black | 2.45:1 | Fails | Lc -12.9 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8FA3B9
oklch(70.7% 0.039 250.9)
-
Step 500
500
#738CA8
oklch(63.1% 0.051 251.5)
-
Step 600
600
#5B7693
oklch(55.6% 0.055 250.6)
-
Step 700
700
#4B637D
oklch(49.1% 0.051 250.9)
-
Step 800
800 (this color)
#3B4E63
oklch(41.7% 0.043 251.4)
-
Step 900
900
#354353
oklch(37.7% 0.033 252.1)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#3B4E63 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) | #464F64 | 0.017 |
| Deuteranopia (no green cones) | #414A63 | 0.014 |
| Tritanopia (no blue cones) | #2D5355 | 0.037 |
| Achromatopsia (no color) | #4C4C4C | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4E63
#3B4E63
oklch(41.7% 0.043 251.4)
- #5B4832
#5B4832
oklch(41.6% 0.043 70.3)
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 #3B4E63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.040
- YInMn Blue #415A77 ΔE 0.045
- Charcoal #264653 ΔE 0.046
- Deep Teal #00555A ΔE 0.054
- Dusty Grape #545775 ΔE 0.055
- Dusk #4E5481 ΔE 0.059
- Charcoal Grey #3C4142 ΔE 0.059
Use #3B4E63 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.