#304768
Closest named color: Dark Grey Blue (#29465B). oklch(39.5% 0.063 257.4), rgb(48, 71, 104).
Aa
White text reads best on this color (9.43:1).
About this color
#304768 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.063 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #304768 |
| RGB | rgb(48, 71, 104) |
| HSL | hsl(215, 37%, 30%) |
| OKLCH | oklch(39.5% 0.063 257.4) |
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 #304768 | 9.43:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #304768 | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #304768 text on white | 9.43:1 | AAA | Lc 91.7 | Preferred for body text |
| #304768 text on black | 2.22:1 | Fails | Lc -10.7 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400
#83A2D0
oklch(70.6% 0.076 258.1)
-
Step 500
500
#638BC4
oklch(63.1% 0.097 257.3)
-
Step 600
600
#4A74B0
oklch(55.6% 0.105 257.4)
-
Step 700
700
#3B6198
oklch(49.1% 0.099 257.6)
-
Step 800
800
#31507B
oklch(42.8% 0.081 256.8)
-
Step 900
900 (this color)
#304768
oklch(39.5% 0.063 257.4)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#304768 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) | #3A4969 | 0.016 |
| Deuteranopia (no green cones) | #334467 | 0.009 |
| Tritanopia (no blue cones) | #154E53 | 0.055 |
| Achromatopsia (no color) | #464646 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304768
#304768
oklch(39.5% 0.063 257.4)
- #59421B
#59421B
oklch(39.6% 0.063 78.3)
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 #304768, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.048
- Light Navy #155084 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.061
- Charcoal Grey #3C4142 ΔE 0.063
Use #304768 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.