#3D455D
Closest named color: Dark Grey Blue (#29465B). oklch(39.3% 0.042 270.1), rgb(61, 69, 93).
Aa
White text reads best on this color (9.51:1).
About this color
#3D455D is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.042 and its hue 270°. 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 9.51:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.20:1 |
| White text | 9.51:1 |
Values
| HEX | #3D455D |
| RGB | rgb(61, 69, 93) |
| HSL | hsl(225, 21%, 30%) |
| OKLCH | oklch(39.3% 0.042 270.1) |
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 #3D455D | 9.51:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #3D455D | 2.20:1 | Fails | Lc 11.9 | Not readable |
| #3D455D text on white | 9.51:1 | AAA | Lc 92.0 | Preferred for body text |
| #3D455D text on black | 2.20:1 | Fails | Lc -10.4 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E5
oklch(88.5% 0.017 267.8)
-
Step 300
300
#B8C0D6
oklch(80.9% 0.032 269.8)
-
Step 400
400
#94A0C1
oklch(70.8% 0.05 269.4)
-
Step 500
500
#7A88B1
oklch(63.1% 0.064 269.9)
-
Step 600
600
#63719D
oklch(55.5% 0.071 270.4)
-
Step 700
700
#525F86
oklch(49.1% 0.065 269.7)
-
Step 800
800
#434E6D
oklch(42.8% 0.054 269)
-
Step 900
900 (this color)
#3D455D
oklch(39.3% 0.042 270.1)
-
Step 950
950
#212634
oklch(27% 0.027 269.3)
#3D455D 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) | #3D475E | 0.006 |
| Deuteranopia (no green cones) | #3B445C | 0.005 |
| Tritanopia (no blue cones) | #344A4D | 0.039 |
| Achromatopsia (no color) | #464646 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D455D
#3D455D
oklch(39.3% 0.042 270.1)
- #4F452B
#4F452B
oklch(39.4% 0.042 89.3)
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 #3D455D, 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 0.037
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.049
- Onyx #343A40 ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.060
- Dark Teal #014D4E ΔE 0.068
- Deep Teal #00555A ΔE 0.069
Use #3D455D 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.