#304053
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.039 253.1), rgb(48, 64, 83).
Aa
White text reads best on this color (10.58:1).
About this color
#304053 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.039 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 10.58:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #304053 |
| RGB | rgb(48, 64, 83) |
| HSL | hsl(213, 27%, 26%) |
| OKLCH | oklch(36.6% 0.039 253.1) |
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 #304053 | 10.58:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #304053 | 1.98:1 | Fails | Lc 9.4 | Not readable |
| #304053 text on white | 10.58:1 | AAA | Lc 94.5 | Preferred for body text |
| #304053 text on black | 1.98:1 | Fails | Lc -8.1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400
#8CA3BE
oklch(70.7% 0.047 252.6)
-
Step 500
500
#708CAD
oklch(63.1% 0.059 252.9)
-
Step 600
600
#587699
oklch(55.7% 0.065 252.8)
-
Step 700
700
#486383
oklch(49.2% 0.061 253.2)
-
Step 800
800
#3B516A
oklch(42.8% 0.05 252.1)
-
Step 900
900 (this color)
#304053
oklch(36.6% 0.039 253.1)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#304053 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) | #394154 | 0.014 |
| Deuteranopia (no green cones) | #353D53 | 0.011 |
| Tritanopia (no blue cones) | #244446 | 0.034 |
| Achromatopsia (no color) | #3F3F3F | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304053
#304053
oklch(36.6% 0.039 253.1)
- #4B3C27
#4B3C27
oklch(36.7% 0.039 75.4)
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 #304053, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.021
- Charcoal #264653 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.030
- Onyx #343A40 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.035
- Midnight Green #073B4C ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.048
- Gunmetal #293241 ΔE 0.052
Use #304053 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.