#333958
Closest named color: Prussian Blue (#1D3557). oklch(35.4% 0.055 274.9), rgb(51, 57, 88).
Aa
White text reads best on this color (11.24:1).
About this color
#333958 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.055 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.035 away. White text reads best on it, at 11.24:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #333958 |
| RGB | rgb(51, 57, 88) |
| HSL | hsl(230, 27%, 27%) |
| OKLCH | oklch(35.4% 0.055 274.9) |
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 #333958 | 11.24:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #333958 | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #333958 text on white | 11.24:1 | AAA | Lc 95.9 | Preferred for body text |
| #333958 text on black | 1.86:1 | Fails | Lc 0.0 | 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
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D4D8E9
oklch(88.4% 0.024 275.3)
-
Step 300
300
#B8BFDC
oklch(80.9% 0.042 274.7)
-
Step 400
400
#949ECA
oklch(70.7% 0.065 274.6)
-
Step 500
500
#7A86BC
oklch(63.2% 0.083 274.2)
-
Step 600
600
#646FA9
oklch(55.7% 0.091 274.9)
-
Step 700
700
#535C91
oklch(49.1% 0.086 275.5)
-
Step 800
800
#444C75
oklch(42.8% 0.069 274.7)
-
Step 900
900 (this color)
#333958
oklch(35.4% 0.055 274.9)
-
Step 950
950
#212537
oklch(26.9% 0.034 274.3)
#333958 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) | #2F3C59 | 0.010 |
| Deuteranopia (no green cones) | #2C3957 | 0.011 |
| Tritanopia (no blue cones) | #283F44 | 0.049 |
| Achromatopsia (no color) | #3B3B3B | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333958
#333958
oklch(35.4% 0.055 274.9)
- #443B17
#443B17
oklch(35.3% 0.054 95.4)
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 #333958, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.041
- Onyx #343A40 ΔE 0.044
- Gunmetal #293241 ΔE 0.047
- Charcoal #264653 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.052
- Midnight Green #073B4C ΔE 0.053
Use #333958 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.