#304C5D
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.044 236.1), rgb(48, 76, 93).
Aa
White text reads best on this color (9.06:1).
About this color
#304C5D is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.044 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #304C5D |
| RGB | rgb(48, 76, 93) |
| HSL | hsl(203, 32%, 28%) |
| OKLCH | oklch(40.2% 0.044 236.1) |
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 #304C5D | 9.06:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #304C5D | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #304C5D text on white | 9.06:1 | AAA | Lc 90.8 | Preferred for body text |
| #304C5D text on black | 2.31:1 | Fails | Lc -11.6 | 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
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ADC4D4
oklch(80.8% 0.034 238.3)
-
Step 400
400
#81A6BE
oklch(70.6% 0.054 237)
-
Step 500
500
#6090AD
oklch(63% 0.068 235.9)
-
Step 600
600
#467A99
oklch(55.6% 0.074 236.3)
-
Step 700
700
#376783
oklch(49.2% 0.069 236.1)
-
Step 800
800
#2E546A
oklch(42.7% 0.057 235.6)
-
Step 900
900 (this color)
#304C5D
oklch(40.2% 0.044 236.1)
-
Step 950
950
#192932
oklch(27.1% 0.027 233.8)
#304C5D 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) | #444B5E | 0.028 |
| Deuteranopia (no green cones) | #3E465D | 0.025 |
| Tritanopia (no blue cones) | #1D5052 | 0.033 |
| Achromatopsia (no color) | #494949 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304C5D
#304C5D
oklch(40.2% 0.044 236.1)
- #5B4231
#5B4231
oklch(40.2% 0.044 55.3)
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 #304C5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.027
- Dark Slate Gray #2F4F4F ΔE 0.029
- Deep Teal #00555A ΔE 0.042
- Dark Teal #014D4E ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.049
- Dark Blue Green #005249 ΔE 0.057
- Petrol #005F6A ΔE 0.060
Use #304C5D 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.