#305166
Closest named color: Dark Grey Blue (#29465B). oklch(41.9% 0.052 237.7), rgb(48, 81, 102).
Aa
White text reads best on this color (8.41:1).
About this color
#305166 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.052 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 8.41:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.49:1 |
| White text | 8.41:1 |
Values
| HEX | #305166 |
| RGB | rgb(48, 81, 102) |
| HSL | hsl(203, 36%, 29%) |
| OKLCH | oklch(41.9% 0.052 237.7) |
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 #305166 | 8.41:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #305166 | 2.49:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #305166 text on white | 8.41:1 | AAA | Lc 88.9 | Fine for body text |
| #305166 text on black | 2.49:1 | Fails | Lc -13.3 | 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
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AFC4D2
oklch(80.9% 0.03 237)
-
Step 400
400
#85A6BC
oklch(70.8% 0.049 237.6)
-
Step 500
500
#658FAB
oklch(63% 0.063 238.2)
-
Step 600
600
#4B7997
oklch(55.5% 0.069 238.3)
-
Step 700
700
#3C6680
oklch(49.1% 0.063 237.1)
-
Step 800
800 (this color)
#305166
oklch(41.9% 0.052 237.7)
-
Step 900
900
#2C4555
oklch(37.7% 0.041 237.4)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#305166 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) | #475167 | 0.030 |
| Deuteranopia (no green cones) | #404B66 | 0.026 |
| Tritanopia (no blue cones) | #145658 | 0.041 |
| Achromatopsia (no color) | #4D4D4D | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305166
#305166
oklch(41.9% 0.052 237.7)
- #634630
#634630
oklch(42% 0.052 57.9)
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 #305166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.038
- Deep Teal #00555A ΔE 0.042
- YInMn Blue #415A77 ΔE 0.044
- Charcoal #264653 ΔE 0.045
- Petrol #005F6A ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.051
- Light Navy #155084 ΔE 0.055
Use #305166 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.