#2A45B0
Closest named color: Sapphire (#2138AB). oklch(44% 0.173 267.6), rgb(42, 69, 176).
Aa
White text reads best on this color (8.15:1).
About this color
#2A45B0 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.173 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.035 away. White text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #2A45B0 |
| RGB | rgb(42, 69, 176) |
| HSL | hsl(228, 61%, 43%) |
| OKLCH | oklch(44% 0.173 267.6) |
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 #2A45B0 | 8.15:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #2A45B0 | 2.57:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #2A45B0 text on white | 8.15:1 | AAA | Lc 87.6 | Fine for body text |
| #2A45B0 text on black | 2.57:1 | Fails | Lc -14.5 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567DFF
oklch(63% 0.198 267.8)
-
Step 600
600
#3C60F4
oklch(55.6% 0.225 267.7)
-
Step 700
700
#2F4ED5
oklch(49.1% 0.209 267.6)
-
Step 800
800 (this color)
#2A45B0
oklch(44% 0.173 267.6)
-
Step 900
900
#233988
oklch(37.8% 0.135 267.6)
-
Step 950
950
#142250
oklch(27% 0.086 267.5)
#2A45B0 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) | #0056B4 | 0.043 |
| Deuteranopia (no green cones) | #0049AE | 0.025 |
| Tritanopia (no blue cones) | #006074 | 0.135 |
| Achromatopsia (no color) | #4F4F4F | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A45B0
#2A45B0
oklch(44% 0.173 267.6)
- #674F00
#674F00
oklch(44% 0.09 88.4)
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 #2A45B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.035
- Blue Blue #2242C7 ΔE 0.038
- Majorelle Blue #3F37C9 ΔE 0.052
- Blueberry #464196 ΔE 0.055
- Cobalt #1E488F ΔE 0.056
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Dusk Blue #26538D ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.072
Use #2A45B0 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.