#305BB5
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.151 262.9), rgb(48, 91, 181).
Aa
White text reads best on this color (6.38:1).
About this color
#305BB5 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.151 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.041 away. White text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.28:1 |
| White text | 6.38:1 |
Values
| HEX | #305BB5 |
| RGB | rgb(48, 91, 181) |
| HSL | hsl(221, 58%, 45%) |
| OKLCH | oklch(49.1% 0.151 262.9) |
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 #305BB5 | 6.38:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #305BB5 | 3.28:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #305BB5 text on white | 6.38:1 | AA | Lc 81.3 | Fine for body text |
| #305BB5 text on black | 3.28:1 | 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
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F1
oklch(80.9% 0.074 263.3)
-
Step 400
400
#79A0EA
oklch(70.8% 0.117 262.5)
-
Step 500
500
#5886E3
oklch(63.1% 0.149 263)
-
Step 600
600
#3E6ED1
oklch(55.7% 0.162 262.8)
-
Step 700
700 (this color)
#305BB5
oklch(49.1% 0.151 262.9)
-
Step 800
800
#284B92
oklch(42.7% 0.124 262.6)
-
Step 900
900
#253F75
oklch(37.7% 0.098 263.2)
-
Step 950
950
#162544
oklch(26.9% 0.061 263.4)
#305BB5 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) | #2765B8 | 0.026 |
| Deuteranopia (no green cones) | #0059B3 | 0.028 |
| Tritanopia (no blue cones) | #00707F | 0.119 |
| Achromatopsia (no color) | #5F5F5F | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305BB5
#305BB5
oklch(49.1% 0.151 262.9)
- #7C5A00
#7C5A00
oklch(49% 0.101 82.9)
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 #305BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.041
- French Blue #436BAD ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.057
- Dusky Blue #475F94 ΔE 0.061
- Iris #6258C4 ΔE 0.068
- Dusk Blue #26538D ΔE 0.068
- Warm Blue #4B57DB ΔE 0.068
- Peacock Blue #016795 ΔE 0.070
Use #305BB5 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.