#33438E
Closest named color: Cobalt (#1E488F). oklch(41.3% 0.125 270.9), rgb(51, 67, 142).
Aa
White text reads best on this color (8.99:1).
About this color
#33438E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.125 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 8.99:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 8.99:1 |
Values
| HEX | #33438E |
| RGB | rgb(51, 67, 142) |
| HSL | hsl(229, 47%, 38%) |
| OKLCH | oklch(41.3% 0.125 270.9) |
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 #33438E | 8.99:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #33438E | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #33438E text on white | 8.99:1 | AAA | Lc 90.4 | Preferred for body text |
| #33438E 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
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AFBFF1
oklch(81% 0.073 270.9)
-
Step 400
400
#859CEA
oklch(70.7% 0.117 270.7)
-
Step 500
500
#6981E3
oklch(63.1% 0.15 271.2)
-
Step 600
600
#5169D1
oklch(55.7% 0.162 270.6)
-
Step 700
700
#4256B5
oklch(49% 0.152 270.9)
-
Step 800
800 (this color)
#33438E
oklch(41.3% 0.125 270.9)
-
Step 900
900
#2F3C75
oklch(37.6% 0.098 271.3)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#33438E 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) | #174D91 | 0.034 |
| Deuteranopia (no green cones) | #00458C | 0.039 |
| Tritanopia (no blue cones) | #005462 | 0.105 |
| Achromatopsia (no color) | #494949 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33438E
#33438E
oklch(41.3% 0.125 270.9)
- #5C4900
#5C4900
oklch(41.3% 0.085 91.7)
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 #33438E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Blueberry #464196 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.033
- Dusk Blue #26538D ΔE 0.045
- Light Navy #155084 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.051
- Twilight #4E518B ΔE 0.059
- Sapphire #2138AB ΔE 0.060
Use #33438E 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.