#3D4055
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.036 278.2), rgb(61, 64, 85).
Aa
White text reads best on this color (10.17:1).
About this color
#3D4055 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.036 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 10.17:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.17:1 |
Values
| HEX | #3D4055 |
| RGB | rgb(61, 64, 85) |
| HSL | hsl(233, 16%, 29%) |
| OKLCH | oklch(37.8% 0.036 278.2) |
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 #3D4055 | 10.17:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #3D4055 | 2.06:1 | Fails | Lc 10.3 | Not readable |
| #3D4055 text on white | 10.17:1 | AAA | Lc 93.6 | Preferred for body text |
| #3D4055 text on black | 2.06:1 | Fails | Lc -8.9 | 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 900.
-
Step 50
50
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D6D8E3
oklch(88.4% 0.015 277.8)
-
Step 300
300
#BCBFD2
oklch(80.8% 0.027 278.6)
-
Step 400
400
#9A9EBC
oklch(70.6% 0.044 279.2)
-
Step 500
500
#8187AB
oklch(63.2% 0.055 277.3)
-
Step 600
600
#6B7097
oklch(55.6% 0.061 278.6)
-
Step 700
700
#595E81
oklch(49.2% 0.056 277.8)
-
Step 800
800
#494D68
oklch(42.8% 0.045 277.8)
-
Step 900
900 (this color)
#3D4055
oklch(37.8% 0.036 278.2)
-
Step 950
950
#242532
oklch(26.9% 0.024 281.2)
#3D4055 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) | #3A4256 | 0.007 |
| Deuteranopia (no green cones) | #394054 | 0.007 |
| Tritanopia (no blue cones) | #374447 | 0.033 |
| Achromatopsia (no color) | #414141 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4055
#3D4055
oklch(37.8% 0.036 278.2)
- #47422C
#47422C
oklch(37.8% 0.036 96.9)
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 #3D4055, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.035
- Charcoal #264653 ΔE 0.036
- Onyx #343A40 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.062
- Gunmetal #293241 ΔE 0.063
Use #3D4055 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.