#2A40A1
Closest named color: Sapphire (#2138AB). oklch(41.7% 0.159 268.7), rgb(42, 64, 161).
Aa
White text reads best on this color (8.94:1).
About this color
#2A40A1 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.159 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.027 away. White text reads best on it, at 8.94:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #2A40A1 |
| RGB | rgb(42, 64, 161) |
| HSL | hsl(229, 59%, 40%) |
| OKLCH | oklch(41.7% 0.159 268.7) |
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 #2A40A1 | 8.94:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #2A40A1 | 2.34:1 | Fails | Lc 14.0 | Not readable |
| #2A40A1 text on white | 8.94:1 | AAA | Lc 90.0 | Preferred for body text |
| #2A40A1 text on black | 2.34:1 | Fails | Lc -12.3 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A8BFFD
oklch(81% 0.092 268.6)
-
Step 400
400
#7A9BFD
oklch(70.8% 0.148 268.4)
-
Step 500
500
#5B7EFB
oklch(63.2% 0.19 268.7)
-
Step 600
600
#4363EA
oklch(55.6% 0.207 268.6)
-
Step 700
700
#3651CB
oklch(49.1% 0.191 268.7)
-
Step 800
800 (this color)
#2A40A1
oklch(41.7% 0.159 268.7)
-
Step 900
900
#273A82
oklch(37.7% 0.123 268.7)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#2A40A1 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) | #004FA4 | 0.041 |
| Deuteranopia (no green cones) | #00449F | 0.027 |
| Tritanopia (no blue cones) | #00586A | 0.126 |
| Achromatopsia (no color) | #494949 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A40A1
#2A40A1
oklch(41.7% 0.159 268.7)
- #5F4900
#5F4900
oklch(41.7% 0.085 88.8)
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 #2A40A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.027
- Cobalt #1E488F ΔE 0.038
- Blueberry #464196 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.055
- Blue Blue #2242C7 ΔE 0.061
- Dusk Blue #26538D ΔE 0.064
- Light Navy #155084 ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.070
Use #2A40A1 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.