#305CBC
Closest named color: Mid Blue (#276AB3). oklch(49.9% 0.159 263.3), rgb(48, 92, 188).
Aa
White text reads best on this color (6.20:1).
About this color
#305CBC is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.159 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.042 away. White text reads best on it, at 6.20:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.38:1 |
| White text | 6.20:1 |
Values
| HEX | #305CBC |
| RGB | rgb(48, 92, 188) |
| HSL | hsl(221, 59%, 46%) |
| OKLCH | oklch(49.9% 0.159 263.3) |
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 #305CBC | 6.20:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #305CBC | 3.38:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #305CBC text on white | 6.20:1 | AA | Lc 80.5 | Fine for body text |
| #305CBC text on black | 3.38:1 | AA large text | Lc -21.3 | 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
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF6
oklch(88.6% 0.042 263)
-
Step 300
300
#A7C1F3
oklch(80.9% 0.077 263.3)
-
Step 400
400
#789FED
oklch(70.7% 0.123 263.3)
-
Step 500
500
#5685E8
oklch(63.1% 0.158 263.4)
-
Step 600
600
#3B6CD6
oklch(55.5% 0.172 263.3)
-
Step 700
700 (this color)
#305CBC
oklch(49.9% 0.159 263.3)
-
Step 800
800
#274A96
oklch(42.7% 0.131 263.3)
-
Step 900
900
#243F77
oklch(37.8% 0.101 263.1)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#305CBC 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) | #2068BF | 0.031 |
| Deuteranopia (no green cones) | #005BBA | 0.026 |
| Tritanopia (no blue cones) | #007383 | 0.126 |
| Achromatopsia (no color) | #616161 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305CBC
#305CBC
oklch(49.9% 0.159 263.3)
- #7F5C00
#7F5C00
oklch(49.8% 0.102 82.7)
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 #305CBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.042
- French Blue #436BAD ΔE 0.056
- Warm Blue #4B57DB ΔE 0.058
- Iris #6258C4 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.067
- Blue Blue #2242C7 ΔE 0.068
- Royal Blue #4169E1 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.069
Use #305CBC 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.