#2A3A98
Closest named color: Sapphire (#2138AB). oklch(39.7% 0.154 270.3), rgb(42, 58, 152).
Aa
White text reads best on this color (9.73:1).
About this color
#2A3A98 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.154 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.033 away. White text reads best on it, at 9.73:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #2A3A98 |
| RGB | rgb(42, 58, 152) |
| HSL | hsl(231, 57%, 38%) |
| OKLCH | oklch(39.7% 0.154 270.3) |
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 #2A3A98 | 9.73:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #2A3A98 | 2.15:1 | Fails | Lc 11.9 | Not readable |
| #2A3A98 text on white | 9.73:1 | AAA | Lc 92.1 | Preferred for body text |
| #2A3A98 text on black | 2.15:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5E7BFF
oklch(63.1% 0.198 270.4)
-
Step 600
600
#4358FF
oklch(55.5% 0.245 270.3)
-
Step 700
700
#3643E5
oklch(49.2% 0.239 270.4)
-
Step 800
800
#2C39B8
oklch(42.7% 0.197 270.5)
-
Step 900
900 (this color)
#2A3A98
oklch(39.7% 0.154 270.3)
-
Step 950
950
#152055
oklch(27% 0.097 269.8)
#2A3A98 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) | #00499B | 0.042 |
| Deuteranopia (no green cones) | #003F96 | 0.030 |
| Tritanopia (no blue cones) | #005263 | 0.124 |
| Achromatopsia (no color) | #444444 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3A98
#2A3A98
oklch(39.7% 0.154 270.3)
- #584400
#584400
oklch(39.7% 0.081 89.6)
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 #2A3A98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.033
- Cobalt #1E488F ΔE 0.040
- Blueberry #464196 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.051
- Twilight Blue #0A437A ΔE 0.062
- Indigo Blue #3A18B1 ΔE 0.068
- Dusk Blue #26538D ΔE 0.072
- Light Navy #155084 ΔE 0.072
Use #2A3A98 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.