#3A445A
Closest named color: Dark Grey Blue (#29465B). oklch(38.7% 0.04 265.6), rgb(58, 68, 90).
Aa
White text reads best on this color (9.74:1).
About this color
#3A445A is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.040 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 9.74:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #3A445A |
| RGB | rgb(58, 68, 90) |
| HSL | hsl(221, 22%, 29%) |
| OKLCH | oklch(38.7% 0.04 265.6) |
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 #3A445A | 9.74:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #3A445A | 2.15:1 | Fails | Lc 11.4 | Not readable |
| #3A445A text on white | 9.74:1 | AAA | Lc 92.6 | Preferred for body text |
| #3A445A text on black | 2.15:1 | Fails | Lc -9.9 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B7C1D5
oklch(80.9% 0.03 264.4)
-
Step 400
400
#92A1BF
oklch(70.8% 0.047 264.2)
-
Step 500
500
#7889AF
oklch(63.1% 0.061 265.9)
-
Step 600
600
#61739B
oklch(55.7% 0.066 265.6)
-
Step 700
700
#506084
oklch(49.1% 0.061 265.7)
-
Step 800
800
#414F6B
oklch(42.8% 0.05 263.8)
-
Step 900
900 (this color)
#3A445A
oklch(38.7% 0.04 265.6)
-
Step 950
950
#202633
oklch(26.9% 0.026 265.4)
#3A445A 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) | #3D465B | 0.008 |
| Deuteranopia (no green cones) | #3A4359 | 0.003 |
| Tritanopia (no blue cones) | #31484B | 0.036 |
| Achromatopsia (no color) | #444444 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A445A
#3A445A
oklch(38.7% 0.04 265.6)
- #4E432B
#4E432B
oklch(38.8% 0.04 85.9)
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 #3A445A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.047
- Onyx #343A40 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark Teal #014D4E ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.066
Use #3A445A 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.