#303458
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.063 277.6), rgb(48, 52, 88).
Aa
White text reads best on this color (11.94:1).
About this color
#303458 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.063 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.026 away. White text reads best on it, at 11.94:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.75:1 |
| White text | 11.94:1 |
Values
| HEX | #303458 |
| RGB | rgb(48, 52, 88) |
| HSL | hsl(234, 29%, 27%) |
| OKLCH | oklch(33.9% 0.063 277.6) |
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 #303458 | 11.94:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #303458 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #303458 text on white | 11.94:1 | AAA | Lc 97.3 | Preferred for body text |
| #303458 text on black | 1.75:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B9BEE0
oklch(80.9% 0.048 278.7)
-
Step 400
400
#959CD0
oklch(70.6% 0.076 278.3)
-
Step 500
500
#7B83C4
oklch(63% 0.098 277.8)
-
Step 600
600
#656CB0
oklch(55.6% 0.105 277.9)
-
Step 700
700
#545A97
oklch(49.1% 0.097 277.9)
-
Step 800
800
#454A7B
oklch(42.8% 0.081 278)
-
Step 900
900 (this color)
#303458
oklch(33.9% 0.063 277.6)
-
Step 950
950
#22243A
oklch(26.9% 0.041 279.3)
#303458 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) | #273859 | 0.017 |
| Deuteranopia (no green cones) | #253557 | 0.016 |
| Tritanopia (no blue cones) | #233B41 | 0.056 |
| Achromatopsia (no color) | #373737 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303458
#303458
oklch(33.9% 0.063 277.6)
- #413809
#413809
oklch(34.1% 0.064 97.8)
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 #303458, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.043
- Gunmetal #293241 ΔE 0.043
- Marine Blue #01386A ΔE 0.052
- Onyx #343A40 ΔE 0.052
- Midnight Green #073B4C ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
Use #303458 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.