#305C77
Closest named color: YInMn Blue (#415A77). oklch(45.5% 0.066 237.5), rgb(48, 92, 119).
Aa
White text reads best on this color (7.18:1).
About this color
#305C77 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.066 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.019 away. White text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.92:1 |
| White text | 7.18:1 |
Values
| HEX | #305C77 |
| RGB | rgb(48, 92, 119) |
| HSL | hsl(203, 43%, 33%) |
| OKLCH | oklch(45.5% 0.066 237.5) |
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 #305C77 | 7.18:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #305C77 | 2.92:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #305C77 text on white | 7.18:1 | AAA | Lc 84.8 | Fine for body text |
| #305C77 text on black | 2.92:1 | Fails | Lc -17.2 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE6
oklch(88.6% 0.021 236.8)
-
Step 300
300
#AAC5D7
oklch(80.9% 0.039 237.2)
-
Step 400
400
#7CA7C3
oklch(70.7% 0.062 237.3)
-
Step 500
500
#5991B4
oklch(63.2% 0.079 237.3)
-
Step 600
600
#3D7A9F
oklch(55.5% 0.086 237.7)
-
Step 700
700
#2F6788
oklch(49.1% 0.079 237.3)
-
Step 800
800 (this color)
#305C77
oklch(45.5% 0.066 237.5)
-
Step 900
900
#25465A
oklch(37.8% 0.052 236.9)
-
Step 950
950
#162934
oklch(27% 0.032 235.1)
#305C77 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) | #505C78 | 0.039 |
| Deuteranopia (no green cones) | #465477 | 0.033 |
| Tritanopia (no blue cones) | #006365 | 0.050 |
| Achromatopsia (no color) | #575757 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305C77
#305C77
oklch(45.5% 0.066 237.5)
- #724D31
#724D31
oklch(45.4% 0.065 57.3)
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 #305C77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.019
- Light Navy Blue #2E5A88 ΔE 0.031
- Petrol #005F6A ΔE 0.039
- Denim #3B638C ΔE 0.040
- Dusty Grape #545775 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.046
- Dusk #4E5481 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.048
Use #305C77 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.