#333D59
Closest named color: Dark Grey Blue (#29465B). oklch(36.4% 0.05 268.8), rgb(51, 61, 89).
Aa
White text reads best on this color (10.75:1).
About this color
#333D59 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.050 and its hue 269°. 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 10.75:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #333D59 |
| RGB | rgb(51, 61, 89) |
| HSL | hsl(224, 27%, 27%) |
| OKLCH | oklch(36.4% 0.05 268.8) |
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 #333D59 | 10.75:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #333D59 | 1.95:1 | Fails | Lc 9.0 | Not readable |
| #333D59 text on white | 10.75:1 | AAA | Lc 94.9 | Preferred for body text |
| #333D59 text on black | 1.95:1 | Fails | Lc -7.7 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DA
oklch(80.8% 0.038 268.8)
-
Step 400
400
#91A0C7
oklch(70.8% 0.06 268.4)
-
Step 500
500
#7688B9
oklch(63.2% 0.077 268.6)
-
Step 600
600
#5F71A5
oklch(55.6% 0.084 269)
-
Step 700
700
#4E5F8D
oklch(49.2% 0.077 268)
-
Step 800
800
#404D73
oklch(42.6% 0.066 269.1)
-
Step 900
900 (this color)
#333D59
oklch(36.4% 0.05 268.8)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#333D59 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) | #333F5A | 0.006 |
| Deuteranopia (no green cones) | #303C58 | 0.006 |
| Tritanopia (no blue cones) | #274347 | 0.046 |
| Achromatopsia (no color) | #3E3E3E | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333D59
#333D59
oklch(36.4% 0.05 268.8)
- #493D1D
#493D1D
oklch(36.5% 0.051 89.2)
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 #333D59, 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 0.036
- Charcoal #264653 ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.042
- Onyx #343A40 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.048
- Gunmetal #293241 ΔE 0.053
- Midnight Green #073B4C ΔE 0.053
Use #333D59 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.