#305BBC
Closest named color: Mid Blue (#276AB3). oklch(49.6% 0.16 263.6), rgb(48, 91, 188).
Aa
White text reads best on this color (6.27:1).
About this color
#305BBC is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.160 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.044 away. White text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.34:1 |
| White text | 6.27:1 |
Values
| HEX | #305BBC |
| RGB | rgb(48, 91, 188) |
| HSL | hsl(222, 59%, 46%) |
| OKLCH | oklch(49.6% 0.16 263.6) |
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 #305BBC | 6.27:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #305BBC | 3.34:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #305BBC text on white | 6.27:1 | AA | Lc 80.8 | Fine for body text |
| #305BBC text on black | 3.34:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF7
oklch(88.6% 0.043 263.7)
-
Step 300
300
#A7C1F4
oklch(80.9% 0.078 263.6)
-
Step 400
400
#789FEE
oklch(70.7% 0.124 263.5)
-
Step 500
500
#5685E9
oklch(63.2% 0.159 263.6)
-
Step 600
600
#3C6CD7
oklch(55.6% 0.173 263.6)
-
Step 700
700 (this color)
#305BBC
oklch(49.6% 0.16 263.6)
-
Step 800
800
#274A97
oklch(42.8% 0.133 263.4)
-
Step 900
900
#243E78
oklch(37.6% 0.104 263.9)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#305BBC 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) | #1C67BF | 0.032 |
| Deuteranopia (no green cones) | #005ABA | 0.026 |
| Tritanopia (no blue cones) | #007283 | 0.126 |
| Achromatopsia (no color) | #606060 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305BBC
#305BBC
oklch(49.6% 0.16 263.6)
- #7E5C00
#7E5C00
oklch(49.7% 0.102 83.4)
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 #305BBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.058
- French Blue #436BAD ΔE 0.058
- Iris #6258C4 ΔE 0.064
- Blue Blue #2242C7 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.068
- Royal Blue #4169E1 ΔE 0.070
- Dusky Blue #475F94 ΔE 0.070
Use #305BBC 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.