#1D64B5
Closest named color: Mid Blue (#276AB3). oklch(50.5% 0.145 254.9), rgb(29, 100, 181).
Aa
White text reads best on this color (5.92:1).
About this color
#1D64B5 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.145 and its hue 255°. 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 5.92:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #1D64B5 |
| RGB | rgb(29, 100, 181) |
| HSL | hsl(212, 72%, 41%) |
| OKLCH | oklch(50.5% 0.145 254.9) |
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 #1D64B5 | 5.92:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #1D64B5 | 3.54:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #1D64B5 text on white | 5.92:1 | AA | Lc 79.2 | Fine for body text |
| #1D64B5 text on black | 3.54:1 | AA large text | Lc -22.6 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C3EE
oklch(80.8% 0.071 255.2)
-
Step 400
400
#6FA3E6
oklch(70.7% 0.113 255.2)
-
Step 500
500
#478BDE
oklch(63.2% 0.143 254.8)
-
Step 600
600
#2673CC
oklch(55.7% 0.156 254.9)
-
Step 700
700 (this color)
#1D64B5
oklch(50.5% 0.145 254.9)
-
Step 800
800
#174F8F
oklch(42.8% 0.12 254.8)
-
Step 900
900
#1A4272
oklch(37.7% 0.094 254.8)
-
Step 950
950
#102743
oklch(27% 0.06 254.6)
#1D64B5 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) | #396BB8 | 0.031 |
| Deuteranopia (no green cones) | #185EB3 | 0.017 |
| Tritanopia (no blue cones) | #007783 | 0.109 |
| Achromatopsia (no color) | #646464 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D64B5
#1D64B5
oklch(50.5% 0.145 254.9)
- #885A00
#885A00
oklch(50.5% 0.107 74.6)
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 #1D64B5, 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 0.042
- Peacock Blue #016795 ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.060
- Ocean Blue #03719C ΔE 0.060
- Muted Blue #3B719F ΔE 0.062
Use #1D64B5 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.