#305CBE
Closest named color: Mid Blue (#276AB3). oklch(50% 0.162 263.5), rgb(48, 92, 190).
Aa
White text reads best on this color (6.17:1).
About this color
#305CBE is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.162 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.043 away. White text reads best on it, at 6.17:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.40:1 |
| White text | 6.17:1 |
Values
| HEX | #305CBE |
| RGB | rgb(48, 92, 190) |
| HSL | hsl(221, 60%, 47%) |
| OKLCH | oklch(50% 0.162 263.5) |
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 #305CBE | 6.17:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #305CBE | 3.40:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #305CBE text on white | 6.17:1 | AA | Lc 80.4 | Fine for body text |
| #305CBE text on black | 3.40:1 | AA large text | Lc -21.5 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A7C1F4
oklch(80.9% 0.078 263.6)
-
Step 400
400
#779FEF
oklch(70.7% 0.126 263.3)
-
Step 500
500
#5585E9
oklch(63.1% 0.159 263.3)
-
Step 600
600
#3B6CD8
oklch(55.7% 0.174 263.4)
-
Step 700
700 (this color)
#305CBE
oklch(50% 0.162 263.5)
-
Step 800
800
#264A97
oklch(42.8% 0.133 263.1)
-
Step 900
900
#233E78
oklch(37.6% 0.104 263.4)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#305CBE 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) | #1C68C2 | 0.032 |
| Deuteranopia (no green cones) | #005BBC | 0.026 |
| Tritanopia (no blue cones) | #007484 | 0.129 |
| Achromatopsia (no color) | #616161 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305CBE
#305CBE
oklch(50% 0.162 263.5)
- #7F5D00
#7F5D00
oklch(50% 0.103 83.6)
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 #305CBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.043
- Warm Blue #4B57DB ΔE 0.055
- French Blue #436BAD ΔE 0.057
- Iris #6258C4 ΔE 0.063
- Royal Blue #4169E1 ΔE 0.066
- Blue Blue #2242C7 ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.070
- Azul #1D5DEC ΔE 0.071
Use #305CBE 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.