#305B71
Closest named color: YInMn Blue (#415A77). oklch(45% 0.06 232.5), rgb(48, 91, 113).
Aa
White text reads best on this color (7.34:1).
About this color
#305B71 is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.060 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.023 away. White text reads best on it, at 7.34:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.86:1 |
| White text | 7.34:1 |
Values
| HEX | #305B71 |
| RGB | rgb(48, 91, 113) |
| HSL | hsl(200, 40%, 32%) |
| OKLCH | oklch(45% 0.06 232.5) |
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 #305B71 | 7.34:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #305B71 | 2.86:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #305B71 text on white | 7.34:1 | AAA | Lc 85.4 | Fine for body text |
| #305B71 text on black | 2.86:1 | Fails | Lc -16.7 | Dividers and decoration only |
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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7EA7BE
oklch(70.7% 0.056 233.1)
-
Step 500
500
#5B91AE
oklch(63% 0.072 233)
-
Step 600
600
#3F7B99
oklch(55.5% 0.078 232.3)
-
Step 700
700
#316883
oklch(49.2% 0.072 232.2)
-
Step 800
800 (this color)
#305B71
oklch(45% 0.06 232.5)
-
Step 900
900
#264656
oklch(37.7% 0.047 231.6)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#305B71 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) | #505A72 | 0.040 |
| Deuteranopia (no green cones) | #475371 | 0.035 |
| Tritanopia (no blue cones) | #006162 | 0.045 |
| Achromatopsia (no color) | #565656 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305B71
#305B71
oklch(45% 0.06 232.5)
- #704C35
#704C35
oklch(45.1% 0.06 53.2)
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 #305B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.023
- Petrol #005F6A ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.039
- Dusty Grape #545775 ΔE 0.048
- Denim #3B638C ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.050
- Dark Aqua #05696B ΔE 0.052
- Dusk #4E5481 ΔE 0.053
Use #305B71 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.