#36438B
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.12 272.4), rgb(54, 67, 139).
Aa
White text reads best on this color (9.00:1).
About this color
#36438B is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.120 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.027 away. White text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #36438B |
| RGB | rgb(54, 67, 139) |
| HSL | hsl(231, 44%, 38%) |
| OKLCH | oklch(41.2% 0.12 272.4) |
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 #36438B | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #36438B | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #36438B text on white | 9.00:1 | AAA | Lc 90.4 | Preferred for body text |
| #36438B text on black | 2.33:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F4
oklch(88.5% 0.04 272.9)
-
Step 300
300
#B1BEEF
oklch(80.8% 0.071 273.1)
-
Step 400
400
#899CE7
oklch(70.8% 0.112 272.4)
-
Step 500
500
#6D81DF
oklch(63.1% 0.143 272.6)
-
Step 600
600
#5669CD
oklch(55.7% 0.155 272.3)
-
Step 700
700
#4657B1
oklch(49.1% 0.144 272.1)
-
Step 800
800 (this color)
#36438B
oklch(41.2% 0.12 272.4)
-
Step 900
900
#313C73
oklch(37.6% 0.095 272.6)
-
Step 950
950
#1D2443
oklch(27.1% 0.058 272.4)
#36438B 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) | #1C4D8E | 0.035 |
| Deuteranopia (no green cones) | #0A4589 | 0.039 |
| Tritanopia (no blue cones) | #005360 | 0.104 |
| Achromatopsia (no color) | #494949 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #36438B
#36438B
oklch(41.2% 0.12 272.4)
- #5B4900
#5B4900
oklch(41.2% 0.084 92.6)
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 #36438B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.027
- Dark Slate Blue #483D8B ΔE 0.030
- Blueberry #464196 ΔE 0.030
- Dusk Blue #26538D ΔE 0.045
- Light Navy #155084 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.051
- Twilight #4E518B ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.062
Use #36438B 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.