#333D55
Closest named color: Dark Grey Blue (#29465B). oklch(36.2% 0.044 266.8), rgb(51, 61, 85).
Aa
White text reads best on this color (10.82:1).
About this color
#333D55 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.044 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 10.82:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.93:1 |
| White text | 10.82:1 |
Values
| HEX | #333D55 |
| RGB | rgb(51, 61, 85) |
| HSL | hsl(222, 25%, 27%) |
| OKLCH | oklch(36.2% 0.044 266.8) |
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 #333D55 | 10.82:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #333D55 | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #333D55 text on white | 10.82:1 | AAA | Lc 95.1 | Preferred for body text |
| #333D55 text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B7C1D7
oklch(81% 0.033 266.1)
-
Step 400
400
#92A0C2
oklch(70.7% 0.052 267.5)
-
Step 500
500
#7789B3
oklch(63.2% 0.067 266.5)
-
Step 600
600
#60729F
oklch(55.6% 0.074 267.2)
-
Step 700
700
#4F6088
oklch(49.2% 0.068 266.3)
-
Step 800
800
#414E6E
oklch(42.7% 0.056 267)
-
Step 900
900 (this color)
#333D55
oklch(36.2% 0.044 266.8)
-
Step 950
950
#202634
oklch(26.9% 0.028 266.5)
#333D55 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) | #353F56 | 0.007 |
| Deuteranopia (no green cones) | #323C54 | 0.004 |
| Tritanopia (no blue cones) | #294245 | 0.040 |
| Achromatopsia (no color) | #3D3D3D | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333D55
#333D55
oklch(36.2% 0.044 266.8)
- #483C22
#483C22
oklch(36.2% 0.044 85.5)
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 #333D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.032
- Charcoal #264653 ΔE 0.033
- Onyx #343A40 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.043
- Gunmetal #293241 ΔE 0.049
- Midnight Green #073B4C ΔE 0.050
Use #333D55 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.