#2B63BC
Closest named color: Mid Blue (#276AB3). oklch(51.2% 0.152 259.4), rgb(43, 99, 188).
Aa
White text reads best on this color (5.81:1).
About this color
#2B63BC is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.152 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.026 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #2B63BC |
| RGB | rgb(43, 99, 188) |
| HSL | hsl(217, 63%, 45%) |
| OKLCH | oklch(51.2% 0.152 259.4) |
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 #2B63BC | 5.81:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #2B63BC | 3.61:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #2B63BC text on white | 5.81:1 | AA | Lc 78.6 | Fine for body text |
| #2B63BC text on black | 3.61:1 | AA large text | Lc -23.1 | 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
#E2EBF9
oklch(93.7% 0.021 259.2)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A5C2F1
oklch(80.9% 0.074 260)
-
Step 400
400
#74A1EA
oklch(70.7% 0.118 259.8)
-
Step 500
500
#4F88E3
oklch(63.1% 0.15 259.4)
-
Step 600
600
#3270D1
oklch(55.7% 0.163 259.2)
-
Step 700
700 (this color)
#2B63BC
oklch(51.2% 0.152 259.4)
-
Step 800
800
#204C93
oklch(42.7% 0.127 259.6)
-
Step 900
900
#1F4075
oklch(37.7% 0.099 259.5)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#2B63BC 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) | #326CBF | 0.026 |
| Deuteranopia (no green cones) | #055FBA | 0.023 |
| Tritanopia (no blue cones) | #007886 | 0.118 |
| Achromatopsia (no color) | #656565 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B63BC
#2B63BC
oklch(51.2% 0.152 259.4)
- #865E00
#865E00
oklch(51.1% 0.106 79.7)
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 #2B63BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.043
- Windows Blue #3778BF ΔE 0.060
- Flat Blue #3C73A8 ΔE 0.063
- Royal Blue #4169E1 ΔE 0.064
- Warm Blue #4B57DB ΔE 0.065
- Dusky Blue #475F94 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.067
Use #2B63BC 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.