#305173
Closest named color: Deep Sea Blue (#015482). oklch(42.6% 0.069 250.4), rgb(48, 81, 115).
Aa
White text reads best on this color (8.23:1).
About this color
#305173 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.069 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.035 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #305173 |
| RGB | rgb(48, 81, 115) |
| HSL | hsl(210, 41%, 32%) |
| OKLCH | oklch(42.6% 0.069 250.4) |
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 #305173 | 8.23:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #305173 | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #305173 text on white | 8.23:1 | AAA | Lc 88.3 | Fine for body text |
| #305173 text on black | 2.55:1 | Fails | Lc -13.8 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CFDBE8
oklch(88.6% 0.022 250.2)
-
Step 300
300
#AEC3DA
oklch(80.9% 0.04 250.7)
-
Step 400
400
#83A4C8
oklch(70.7% 0.064 250.9)
-
Step 500
500
#638DBA
oklch(63.1% 0.083 250.9)
-
Step 600
600
#4977A6
oklch(55.7% 0.089 250.2)
-
Step 700
700
#3A648E
oklch(49.2% 0.083 249.8)
-
Step 800
800 (this color)
#305173
oklch(42.6% 0.069 250.4)
-
Step 900
900
#2B445D
oklch(37.8% 0.053 249.4)
-
Step 950
950
#1A2837
oklch(27.1% 0.034 250.8)
#305173 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) | #435275 | 0.025 |
| Deuteranopia (no green cones) | #3A4C72 | 0.018 |
| Tritanopia (no blue cones) | #00595D | 0.060 |
| Achromatopsia (no color) | #4F4F4F | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305173
#305173
oklch(42.6% 0.069 250.4)
- #664820
#664820
oklch(42.6% 0.069 71.9)
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 #305173, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.035
- Light Navy #155084 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.039
- Dusk Blue #26538D ΔE 0.043
- Dusk #4E5481 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.049
- Dusty Grape #545775 ΔE 0.054
Use #305173 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.