#2A3D9C
Closest named color: Sapphire (#2138AB). oklch(40.7% 0.156 269.5), rgb(42, 61, 156).
Aa
White text reads best on this color (9.34:1).
About this color
#2A3D9C is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.156 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.029 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #2A3D9C |
| RGB | rgb(42, 61, 156) |
| HSL | hsl(230, 58%, 39%) |
| OKLCH | oklch(40.7% 0.156 269.5) |
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 #2A3D9C | 9.34:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #2A3D9C | 2.24:1 | Fails | Lc 12.9 | Not readable |
| #2A3D9C text on white | 9.34:1 | AAA | Lc 91.1 | Preferred for body text |
| #2A3D9C text on black | 2.24:1 | Fails | Lc -11.3 | 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
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400
#7D9AFB
oklch(70.7% 0.146 269.8)
-
Step 500
500
#5E7EF8
oklch(63.2% 0.185 269.4)
-
Step 600
600
#4763E7
oklch(55.6% 0.202 269.6)
-
Step 700
700
#3951C9
oklch(49.1% 0.188 269.5)
-
Step 800
800 (this color)
#2A3D9C
oklch(40.7% 0.156 269.5)
-
Step 900
900
#293A81
oklch(37.7% 0.121 269.6)
-
Step 950
950
#18234C
oklch(27.1% 0.077 269.4)
#2A3D9C 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) | #004C9F | 0.041 |
| Deuteranopia (no green cones) | #00419A | 0.029 |
| Tritanopia (no blue cones) | #005566 | 0.125 |
| Achromatopsia (no color) | #474747 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3D9C
#2A3D9C
oklch(40.7% 0.156 269.5)
- #5B4700
#5B4700
oklch(40.7% 0.083 90.3)
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 #2A3D9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.029
- Cobalt #1E488F ΔE 0.037
- Blueberry #464196 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.051
- Twilight Blue #0A437A ΔE 0.066
- Dusk Blue #26538D ΔE 0.067
- Light Navy #155084 ΔE 0.069
- Indigo Blue #3A18B1 ΔE 0.070
Use #2A3D9C 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.