#3D4758
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.032 261), rgb(61, 71, 88).
Aa
White text reads best on this color (9.37:1).
About this color
#3D4758 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.032 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.027 away. White text reads best on it, at 9.37:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #3D4758 |
| RGB | rgb(61, 71, 88) |
| HSL | hsl(218, 18%, 29%) |
| OKLCH | oklch(39.6% 0.032 261) |
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 #3D4758 | 9.37:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #3D4758 | 2.24:1 | Fails | Lc 12.3 | Not readable |
| #3D4758 text on white | 9.37:1 | AAA | Lc 91.7 | Preferred for body text |
| #3D4758 text on black | 2.24:1 | Fails | Lc -10.7 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B8C1D0
oklch(80.9% 0.023 260.7)
-
Step 400
400
#93A1B9
oklch(70.6% 0.039 261.3)
-
Step 500
500
#798AA8
oklch(63.1% 0.049 261.7)
-
Step 600
600
#627493
oklch(55.6% 0.053 261.2)
-
Step 700
700
#51617D
oklch(49% 0.049 261.5)
-
Step 800
800
#424F66
oklch(42.6% 0.042 261.7)
-
Step 900
900 (this color)
#3D4758
oklch(39.6% 0.032 261)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#3D4758 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) | #414859 | 0.007 |
| Deuteranopia (no green cones) | #3F4558 | 0.007 |
| Tritanopia (no blue cones) | #364A4D | 0.026 |
| Achromatopsia (no color) | #464646 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4758
#3D4758
oklch(39.6% 0.032 261)
- #4F4533
#4F4533
oklch(39.5% 0.032 82.1)
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 #3D4758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.027
- Charcoal #264653 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.038
- Onyx #343A40 ΔE 0.054
- Dark Teal #014D4E ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.061
- Deep Teal #00555A ΔE 0.061
Use #3D4758 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.