#2145B1
Closest named color: Sapphire (#2138AB). oklch(43.7% 0.177 265.3), rgb(33, 69, 177).
Aa
White text reads best on this color (8.23:1).
About this color
#2145B1 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.177 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.032 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #2145B1 |
| RGB | rgb(33, 69, 177) |
| HSL | hsl(225, 69%, 41%) |
| OKLCH | oklch(43.7% 0.177 265.3) |
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 #2145B1 | 8.23:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #2145B1 | 2.55:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #2145B1 text on white | 8.23:1 | AAA | Lc 87.8 | Fine for body text |
| #2145B1 text on black | 2.55:1 | Fails | Lc -14.4 | 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
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#729CFF
oklch(70.6% 0.153 265.4)
-
Step 500
500
#4E7FFF
oklch(63% 0.198 265.3)
-
Step 600
600
#3061F7
oklch(55.6% 0.23 265.4)
-
Step 700
700
#244FD7
oklch(49.1% 0.213 265.3)
-
Step 800
800 (this color)
#2145B1
oklch(43.7% 0.177 265.3)
-
Step 900
900
#1D3989
oklch(37.6% 0.138 265.5)
-
Step 950
950
#112350
oklch(27.1% 0.086 264.8)
#2145B1 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) | #0056B5 | 0.042 |
| Deuteranopia (no green cones) | #0048AF | 0.017 |
| Tritanopia (no blue cones) | #006174 | 0.138 |
| Achromatopsia (no color) | #4F4F4F | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2145B1
#2145B1
oklch(43.7% 0.177 265.3)
- #684D00
#684D00
oklch(43.7% 0.09 85.3)
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 #2145B1, closest first.
No curated palette has a color within ΔE 0.04 of #2145B1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.032
- Blue Blue #2242C7 ΔE 0.035
- Majorelle Blue #3F37C9 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
- Blueberry #464196 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Dusk Blue #26538D ΔE 0.073
- Dark Slate Blue #483D8B ΔE 0.078
Use #2145B1 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.