#1C73AF
Closest named color: Nice Blue (#107AB0). oklch(53.6% 0.122 244.7), rgb(28, 115, 175).
Aa
White text reads best on this color (5.09:1).
About this color
#1C73AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.122 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.020 away. White text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #1C73AF |
| RGB | rgb(28, 115, 175) |
| HSL | hsl(204, 72%, 40%) |
| OKLCH | oklch(53.6% 0.122 244.7) |
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 #1C73AF | 5.09:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #1C73AF | 4.12:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #1C73AF text on white | 5.09:1 | AA | Lc 74.7 | Content text, not long reading |
| #1C73AF text on black | 4.12:1 | AA large text | Lc -27.0 | 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 600.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C5E2
oklch(80.8% 0.055 244.3)
-
Step 400
400
#70A7D4
oklch(70.8% 0.088 244.2)
-
Step 500
500
#4790C9
oklch(63.1% 0.113 244.6)
-
Step 600
600 (this color)
#1C73AF
oklch(53.6% 0.122 244.7)
-
Step 700
700
#15669C
oklch(49.2% 0.113 244.3)
-
Step 800
800
#16537F
oklch(42.7% 0.095 245)
-
Step 900
900
#1A4566
oklch(37.7% 0.074 244.9)
-
Step 950
950
#11293C
oklch(27.2% 0.047 244.6)
#1C73AF 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) | #5775B2 | 0.052 |
| Deuteranopia (no green cones) | #4268AE | 0.038 |
| Tritanopia (no blue cones) | #008289 | 0.085 |
| Achromatopsia (no color) | #6E6E6E | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C73AF
#1C73AF
oklch(53.6% 0.122 244.7)
- #9C5C00
#9C5C00
oklch(53.6% 0.12 64.9)
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 #1C73AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.023
- Mid Blue #276AB3 ΔE 0.027
- Muted Blue #3B719F ΔE 0.030
- Ocean Blue #03719C ΔE 0.032
- French Blue #436BAD ΔE 0.033
- Windows Blue #3778BF ΔE 0.034
- Sea Blue #047495 ΔE 0.044
Use #1C73AF 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.