#2564AF
Closest named color: Mid Blue (#276AB3). oklch(50.3% 0.135 255.1), rgb(37, 100, 175).
Aa
White text reads best on this color (5.96:1).
About this color
#2564AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.135 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.018 away. White text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.52:1 |
| White text | 5.96:1 |
Values
| HEX | #2564AF |
| RGB | rgb(37, 100, 175) |
| HSL | hsl(213, 65%, 42%) |
| OKLCH | oklch(50.3% 0.135 255.1) |
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 #2564AF | 5.96:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #2564AF | 3.52:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #2564AF text on white | 5.96:1 | AA | Lc 79.4 | Fine for body text |
| #2564AF text on black | 3.52:1 | AA large text | Lc -22.4 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A5C3EB
oklch(80.9% 0.066 255.7)
-
Step 400
400
#73A3E1
oklch(70.6% 0.105 255.2)
-
Step 500
500
#4D8BD8
oklch(63.1% 0.133 254.9)
-
Step 600
600
#2F73C6
oklch(55.5% 0.146 255.3)
-
Step 700
700 (this color)
#2564AF
oklch(50.3% 0.135 255.1)
-
Step 800
800
#1D4F8B
oklch(42.7% 0.113 255.1)
-
Step 900
900
#1E426F
oklch(37.7% 0.088 255.3)
-
Step 950
950
#122741
oklch(27% 0.056 254.8)
#2564AF 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) | #3F6AB2 | 0.031 |
| Deuteranopia (no green cones) | #255EAE | 0.017 |
| Tritanopia (no blue cones) | #007681 | 0.103 |
| Achromatopsia (no color) | #636363 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2564AF
#2564AF
oklch(50.3% 0.135 255.1)
- #875A00
#875A00
oklch(50.4% 0.106 75.2)
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 #2564AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.018
- French Blue #436BAD ΔE 0.036
- Peacock Blue #016795 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.050
- Dusky Blue #475F94 ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.053
- Ocean Blue #03719C ΔE 0.054
- Muted Blue #3B719F ΔE 0.054
Use #2564AF 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.