#305CB1
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.144 262), rgb(48, 92, 177).
Aa
White text reads best on this color (6.38:1).
About this color
#305CB1 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.144 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.038 away. White text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.29:1 |
| White text | 6.38:1 |
Values
| HEX | #305CB1 |
| RGB | rgb(48, 92, 177) |
| HSL | hsl(220, 57%, 44%) |
| OKLCH | oklch(49.1% 0.144 262) |
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 #305CB1 | 6.38:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #305CB1 | 3.29:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #305CB1 text on white | 6.38:1 | AA | Lc 81.4 | Fine for body text |
| #305CB1 text on black | 3.29:1 | AA large text | Lc -20.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A8C1EE
oklch(80.8% 0.07 262.1)
-
Step 400
400
#7AA0E6
oklch(70.6% 0.111 262.1)
-
Step 500
500
#5887DF
oklch(63.1% 0.143 261.9)
-
Step 600
600
#3E6FCD
oklch(55.7% 0.155 262)
-
Step 700
700 (this color)
#305CB1
oklch(49.1% 0.144 262)
-
Step 800
800
#284C8F
oklch(42.7% 0.119 261.5)
-
Step 900
900
#254072
oklch(37.7% 0.092 261.6)
-
Step 950
950
#162643
oklch(27.1% 0.058 261.5)
#305CB1 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) | #2E65B4 | 0.024 |
| Deuteranopia (no green cones) | #095AAF | 0.025 |
| Tritanopia (no blue cones) | #00707E | 0.114 |
| Achromatopsia (no color) | #5F5F5F | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305CB1
#305CB1
oklch(49.1% 0.144 262)
- #7D5A00
#7D5A00
oklch(49.1% 0.101 82.2)
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 #305CB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.038
- French Blue #436BAD ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.050
- Dusky Blue #475F94 ΔE 0.054
- Dusk Blue #26538D ΔE 0.063
- Peacock Blue #016795 ΔE 0.064
- Light Navy Blue #2E5A88 ΔE 0.066
- Denim #3B638C ΔE 0.067
Use #305CB1 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.