#3A436F
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.075 273.7), rgb(58, 67, 111).
Aa
White text reads best on this color (9.49:1).
About this color
#3A436F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.045 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #3A436F |
| RGB | rgb(58, 67, 111) |
| HSL | hsl(230, 31%, 33%) |
| OKLCH | oklch(39.6% 0.075 273.7) |
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 #3A436F | 9.49:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #3A436F | 2.21:1 | Fails | Lc 12.1 | Not readable |
| #3A436F text on white | 9.49:1 | AAA | Lc 91.9 | Preferred for body text |
| #3A436F text on black | 2.21:1 | Fails | Lc -10.5 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B5BFE6
oklch(81% 0.056 273.8)
-
Step 400
400
#8F9DD9
oklch(70.8% 0.089 273.8)
-
Step 500
500
#7483CF
oklch(63.1% 0.116 274.1)
-
Step 600
600
#5D6CBC
oklch(55.7% 0.125 273.7)
-
Step 700
700
#4D5AA2
oklch(49.2% 0.116 273.7)
-
Step 800
800
#3F4983
oklch(42.6% 0.097 274.2)
-
Step 900
900 (this color)
#3A436F
oklch(39.6% 0.075 273.7)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#3A436F 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) | #334871 | 0.016 |
| Deuteranopia (no green cones) | #2E446E | 0.017 |
| Tritanopia (no blue cones) | #274C53 | 0.068 |
| Achromatopsia (no color) | #464646 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A436F
#3A436F
oklch(39.6% 0.075 273.7)
- #54450B
#54450B
oklch(39.5% 0.075 93.4)
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 #3A436F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.049
- Light Navy #155084 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Charcoal #264653 ΔE 0.060
- Dusk Blue #26538D ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.063
Use #3A436F 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.