#2C66BC
Closest named color: Mid Blue (#276AB3). oklch(51.9% 0.148 258.4), rgb(44, 102, 188).
Aa
White text reads best on this color (5.62:1).
About this color
#2C66BC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.148 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.020 away. White text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #2C66BC |
| RGB | rgb(44, 102, 188) |
| HSL | hsl(216, 62%, 45%) |
| OKLCH | oklch(51.9% 0.148 258.4) |
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 #2C66BC | 5.62:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #2C66BC | 3.73:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #2C66BC text on white | 5.62:1 | AA | Lc 77.7 | Fine for body text |
| #2C66BC text on black | 3.73:1 | AA large text | Lc -24.1 | 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
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DAF4
oklch(88.4% 0.04 258.8)
-
Step 300
300
#A5C2EF
oklch(80.8% 0.071 259.1)
-
Step 400
400
#73A2E8
oklch(70.8% 0.115 258.1)
-
Step 500
500
#4E89E1
oklch(63.2% 0.147 258.2)
-
Step 600
600
#3170CF
oklch(55.5% 0.161 258.7)
-
Step 700
700 (this color)
#2C66BC
oklch(51.9% 0.148 258.4)
-
Step 800
800
#1F4D91
oklch(42.7% 0.123 258.4)
-
Step 900
900
#1F4173
oklch(37.8% 0.095 258.1)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#2C66BC 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) | #396EBF | 0.026 |
| Deuteranopia (no green cones) | #1861BA | 0.020 |
| Tritanopia (no blue cones) | #007A88 | 0.114 |
| Achromatopsia (no color) | #676767 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C66BC
#2C66BC
oklch(51.9% 0.148 258.4)
- #8A5F00
#8A5F00
oklch(51.8% 0.108 77.9)
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 #2C66BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.020
- French Blue #436BAD ΔE 0.037
- Windows Blue #3778BF ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.056
- Royal Blue #4169E1 ΔE 0.062
- Muted Blue #3B719F ΔE 0.062
- Nice Blue #107AB0 ΔE 0.063
- Dusky Blue #475F94 ΔE 0.066
Use #2C66BC 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.