#1C45AF
Closest named color: Sapphire (#2138AB). oklch(43.3% 0.175 264.2), rgb(28, 69, 175).
Aa
White text reads best on this color (8.33:1).
About this color
#1C45AF is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.175 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.030 away. White text reads best on it, at 8.33:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.51:1 |
| White text | 8.33:1 |
Values
| HEX | #1C45AF |
| RGB | rgb(28, 69, 175) |
| HSL | hsl(223, 72%, 40%) |
| OKLCH | oklch(43.3% 0.175 264.2) |
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 #1C45AF | 8.33:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #1C45AF | 2.51:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #1C45AF text on white | 8.33:1 | AAA | Lc 88.1 | Fine for body text |
| #1C45AF text on black | 2.51:1 | Fails | Lc -14.1 | Not readable |
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 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#2A63F6
oklch(55.7% 0.228 264.1)
-
Step 700
700
#1E50D6
oklch(49% 0.212 264.2)
-
Step 800
800 (this color)
#1C45AF
oklch(43.3% 0.175 264.2)
-
Step 900
900
#1A3A89
oklch(37.7% 0.137 264.1)
-
Step 950
950
#102350
oklch(27% 0.086 264.2)
#1C45AF 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) | #0055B3 | 0.040 |
| Deuteranopia (no green cones) | #0047AD | 0.013 |
| Tritanopia (no blue cones) | #006073 | 0.135 |
| Achromatopsia (no color) | #4E4E4E | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C45AF
#1C45AF
oklch(43.3% 0.175 264.2)
- #684C00
#684C00
oklch(43.5% 0.089 84.2)
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 #1C45AF, closest first.
No curated palette has a color within ΔE 0.04 of #1C45AF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.030
- Blue Blue #2242C7 ΔE 0.039
- Cobalt #1E488F ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Dusk Blue #26538D ΔE 0.071
- Blue With A Hint Of Purple #533CC6 ΔE 0.077
- Dark Slate Blue #483D8B ΔE 0.078
Use #1C45AF 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.