#33407C
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.102 271.8), rgb(51, 64, 124).
Aa
White text reads best on this color (9.69:1).
About this color
#33407C is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.102 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 9.69:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.16:1 |
| White text | 9.69:1 |
Values
| HEX | #33407C |
| RGB | rgb(51, 64, 124) |
| HSL | hsl(229, 42%, 34%) |
| OKLCH | oklch(39.3% 0.102 271.8) |
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 #33407C | 9.69:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #33407C | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #33407C text on white | 9.69:1 | AAA | Lc 92.3 | Preferred for body text |
| #33407C text on black | 2.16:1 | Fails | Lc -10.1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AFBEF3
oklch(80.9% 0.077 272.3)
-
Step 400
400
#869BED
oklch(70.7% 0.123 272)
-
Step 500
500
#6980E7
oklch(63.1% 0.156 271.8)
-
Step 600
600
#5267D5
oklch(55.6% 0.17 271.7)
-
Step 700
700
#4355B9
oklch(49.1% 0.158 271.7)
-
Step 800
800
#374696
oklch(42.7% 0.132 271.7)
-
Step 900
900 (this color)
#33407C
oklch(39.3% 0.102 271.8)
-
Step 950
950
#1B2346
oklch(26.9% 0.066 271.6)
#33407C 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) | #24487E | 0.026 |
| Deuteranopia (no green cones) | #1A417B | 0.028 |
| Tritanopia (no blue cones) | #054D58 | 0.090 |
| Achromatopsia (no color) | #444444 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33407C
#33407C
oklch(39.3% 0.102 271.8)
- #554400
#554400
oklch(39.3% 0.08 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 #33407C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Cobalt #1E488F ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.042
- Light Navy #155084 ΔE 0.049
- Blueberry #464196 ΔE 0.052
- Dusk Blue #26538D ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.062
- Marine Blue #01386A ΔE 0.064
Use #33407C 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.