#33406E
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.08 270.4), rgb(51, 64, 110).
Aa
White text reads best on this color (10.00:1).
About this color
#33406E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.080 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.040 away. White text reads best on it, at 10.00:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.09:1 |
| White text | 10.00:1 |
Values
| HEX | #33406E |
| RGB | rgb(51, 64, 110) |
| HSL | hsl(227, 37%, 32%) |
| OKLCH | oklch(38.3% 0.08 270.4) |
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 #33406E | 10.00:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #33406E | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #33406E text on white | 10.00:1 | AAA | Lc 93.1 | Preferred for body text |
| #33406E text on black | 2.09:1 | Fails | Lc -9.4 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B1BFE8
oklch(80.8% 0.06 270.2)
-
Step 400
400
#899EDD
oklch(70.7% 0.096 269.7)
-
Step 500
500
#6D84D4
oklch(63.1% 0.124 270.4)
-
Step 600
600
#566CC1
oklch(55.5% 0.134 270.6)
-
Step 700
700
#465AA7
oklch(49.1% 0.125 270.3)
-
Step 800
800
#3A4A87
oklch(42.7% 0.103 270.5)
-
Step 900
900 (this color)
#33406E
oklch(38.3% 0.08 270.4)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#33406E 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) | #2E4570 | 0.015 |
| Deuteranopia (no green cones) | #27406D | 0.016 |
| Tritanopia (no blue cones) | #194A51 | 0.073 |
| Achromatopsia (no color) | #424242 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33406E
#33406E
oklch(38.3% 0.08 270.4)
- #534100
#534100
oklch(38.4% 0.078 90.9)
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 #33406E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.044
- Light Navy #155084 ΔE 0.056
- Marine Blue #01386A ΔE 0.056
- Charcoal #264653 ΔE 0.058
- Cobalt #1E488F ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
Use #33406E 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.