#333D65
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.07 272), rgb(51, 61, 101).
Aa
White text reads best on this color (10.52:1).
About this color
#333D65 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.070 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.039 away. White text reads best on it, at 10.52:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.52:1 |
Values
| HEX | #333D65 |
| RGB | rgb(51, 61, 101) |
| HSL | hsl(228, 33%, 30%) |
| OKLCH | oklch(37.1% 0.07 272) |
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 #333D65 | 10.52:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #333D65 | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #333D65 text on white | 10.52:1 | AAA | Lc 94.3 | Preferred for body text |
| #333D65 text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B4BFE3
oklch(80.8% 0.052 271.8)
-
Step 400
400
#8E9ED6
oklch(70.8% 0.084 271.8)
-
Step 500
500
#7385CB
oklch(63.2% 0.108 272)
-
Step 600
600
#5C6DB7
oklch(55.5% 0.117 272.3)
-
Step 700
700
#4B5B9E
oklch(49.1% 0.109 271.7)
-
Step 800
800
#3E4B80
oklch(42.8% 0.089 271.8)
-
Step 900
900 (this color)
#333D65
oklch(37.1% 0.07 272)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#333D65 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) | #2E4167 | 0.013 |
| Deuteranopia (no green cones) | #293D64 | 0.014 |
| Tritanopia (no blue cones) | #20454C | 0.062 |
| Achromatopsia (no color) | #3F3F3F | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333D65
#333D65
oklch(37.1% 0.07 272)
- #4D3E09
#4D3E09
oklch(37% 0.07 91.9)
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 #333D65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.049
- Charcoal #264653 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
- Marine Blue #01386A ΔE 0.053
- Onyx #343A40 ΔE 0.064
- Midnight Green #073B4C ΔE 0.066
Use #333D65 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.