#305FAB
Closest named color: Mid Blue (#276AB3). oklch(49.3% 0.132 259.6), rgb(48, 95, 171).
Aa
White text reads best on this color (6.26:1).
About this color
#305FAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.132 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #305FAB |
| RGB | rgb(48, 95, 171) |
| HSL | hsl(217, 56%, 43%) |
| OKLCH | oklch(49.3% 0.132 259.6) |
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 #305FAB | 6.26:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #305FAB | 3.35:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #305FAB text on white | 6.26:1 | AA | Lc 80.9 | Fine for body text |
| #305FAB text on black | 3.35:1 | AA large text | Lc -21.0 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A9C2EB
oklch(80.9% 0.064 260.3)
-
Step 400
400
#7AA2E0
oklch(70.8% 0.101 258.9)
-
Step 500
500
#5889D8
oklch(63.1% 0.131 259.5)
-
Step 600
600
#3D71C5
oklch(55.5% 0.142 259.6)
-
Step 700
700 (this color)
#305FAB
oklch(49.3% 0.132 259.6)
-
Step 800
800
#284D8A
oklch(42.6% 0.11 259.9)
-
Step 900
900
#25416E
oklch(37.7% 0.085 259.5)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#305FAB 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) | #3966AE | 0.023 |
| Deuteranopia (no green cones) | #235BA9 | 0.017 |
| Tritanopia (no blue cones) | #00717C | 0.106 |
| Achromatopsia (no color) | #606060 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305FAB
#305FAB
oklch(49.3% 0.132 259.6)
- #805900
#805900
oklch(49.3% 0.102 79)
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 #305FAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.040
- French Blue #436BAD ΔE 0.041
- Dusky Blue #475F94 ΔE 0.043
- Peacock Blue #016795 ΔE 0.051
- Denim #3B638C ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.057
- Dusk Blue #26538D ΔE 0.058
Use #305FAB 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.