#39405D
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.051 273.3), rgb(57, 64, 93).
Aa
White text reads best on this color (10.16:1).
About this color
#39405D is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.051 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.028 away. White text reads best on it, at 10.16:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.16:1 |
Values
| HEX | #39405D |
| RGB | rgb(57, 64, 93) |
| HSL | hsl(228, 24%, 29%) |
| OKLCH | oklch(37.8% 0.051 273.3) |
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 #39405D | 10.16:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #39405D | 2.06:1 | Fails | Lc 10.3 | Not readable |
| #39405D text on white | 10.16:1 | AAA | Lc 93.6 | Preferred for body text |
| #39405D 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F1
oklch(93.5% 0.011 274.9)
-
Step 200
200
#D4D8E8
oklch(88.4% 0.022 274.7)
-
Step 300
300
#B8C0DA
oklch(81% 0.038 272)
-
Step 400
400
#949FC7
oklch(70.8% 0.06 272.8)
-
Step 500
500
#7A86B9
oklch(63% 0.078 273.8)
-
Step 600
600
#6370A5
oklch(55.7% 0.084 272.9)
-
Step 700
700
#525D8D
oklch(49% 0.078 273.3)
-
Step 800
800
#434C73
oklch(42.6% 0.066 273.4)
-
Step 900
900 (this color)
#39405D
oklch(37.8% 0.051 273.3)
-
Step 950
950
#212536
oklch(26.9% 0.032 273.8)
#39405D 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) | #37435E | 0.009 |
| Deuteranopia (no green cones) | #34405C | 0.008 |
| Tritanopia (no blue cones) | #2E464A | 0.046 |
| Achromatopsia (no color) | #414141 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39405D
#39405D
oklch(37.8% 0.051 273.3)
- #4B4121
#4B4121
oklch(37.7% 0.05 92.5)
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 #39405D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.028
- Charcoal #264653 ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.049
- Onyx #343A40 ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.061
- Twilight Blue #0A437A ΔE 0.064
Use #39405D 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.