#304E65
Closest named color: Dark Grey Blue (#29465B). oklch(41.1% 0.053 242.6), rgb(48, 78, 101).
Aa
White text reads best on this color (8.73:1).
About this color
#304E65 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.053 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 8.73:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #304E65 |
| RGB | rgb(48, 78, 101) |
| HSL | hsl(206, 36%, 29%) |
| OKLCH | oklch(41.1% 0.053 242.6) |
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 #304E65 | 8.73:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #304E65 | 2.40:1 | Fails | Lc 14.1 | Not readable |
| #304E65 text on white | 8.73:1 | AAA | Lc 89.9 | Fine for body text |
| #304E65 text on black | 2.40:1 | Fails | Lc -12.4 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D3
oklch(80.8% 0.031 243.5)
-
Step 400
400
#86A5BD
oklch(70.7% 0.049 241.7)
-
Step 500
500
#688EAD
oklch(63% 0.063 243.6)
-
Step 600
600
#4E7898
oklch(55.5% 0.068 242.3)
-
Step 700
700
#3F6582
oklch(49.1% 0.064 242.5)
-
Step 800
800 (this color)
#304E65
oklch(41.1% 0.053 242.6)
-
Step 900
900
#2E4456
oklch(37.6% 0.041 243.9)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#304E65 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) | #444E66 | 0.027 |
| Deuteranopia (no green cones) | #3D4865 | 0.024 |
| Tritanopia (no blue cones) | #165456 | 0.044 |
| Achromatopsia (no color) | #4B4B4B | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E65
#304E65
oklch(41.1% 0.053 242.6)
- #5F442C
#5F442C
oklch(41% 0.052 62.2)
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 #304E65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal #264653 ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.039
- Deep Teal #00555A ΔE 0.046
- YInMn Blue #415A77 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.052
- Light Navy #155084 ΔE 0.054
- Petrol #005F6A ΔE 0.056
Use #304E65 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.