#304359
Closest named color: Dark Grey Blue (#29465B). oklch(37.7% 0.045 252.6), rgb(48, 67, 89).
Aa
White text reads best on this color (10.13:1).
About this color
#304359 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.045 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.012 away. White text reads best on it, at 10.13:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.07:1 |
| White text | 10.13:1 |
Values
| HEX | #304359 |
| RGB | rgb(48, 67, 89) |
| HSL | hsl(212, 30%, 27%) |
| OKLCH | oklch(37.7% 0.045 252.6) |
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 #304359 | 10.13:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #304359 | 2.07:1 | Fails | Lc 10.5 | Not readable |
| #304359 text on white | 10.13:1 | AAA | Lc 93.5 | Preferred for body text |
| #304359 text on black | 2.07:1 | Fails | Lc -9.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D6
oklch(80.8% 0.033 254)
-
Step 400
400
#89A3C2
oklch(70.7% 0.054 253)
-
Step 500
500
#6B8CB3
oklch(63% 0.07 253)
-
Step 600
600
#53769E
oklch(55.6% 0.074 252.4)
-
Step 700
700
#436388
oklch(49.1% 0.071 252.8)
-
Step 800
800
#38516E
oklch(42.8% 0.057 252.8)
-
Step 900
900 (this color)
#304359
oklch(37.7% 0.045 252.6)
-
Step 950
950
#1C2734
oklch(26.9% 0.029 253)
#304359 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) | #3B445A | 0.017 |
| Deuteranopia (no green cones) | #364059 | 0.012 |
| Tritanopia (no blue cones) | #21484A | 0.040 |
| Achromatopsia (no color) | #414141 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304359
#304359
oklch(37.7% 0.045 252.6)
- #503E26
#503E26
oklch(37.7% 0.045 73.7)
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 #304359, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.012
- Charcoal #264653 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.041
- Onyx #343A40 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.054
- Dark Teal #014D4E ΔE 0.055
Use #304359 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.