#2B2B9E
Closest named color: Sapphire (#2138AB). oklch(37.8% 0.179 273.7), rgb(43, 43, 158).
Aa
White text reads best on this color (10.81:1).
About this color
#2B2B9E is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.179 and its hue 274°. 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 10.81:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.94:1 |
| White text | 10.81:1 |
Values
| HEX | #2B2B9E |
| RGB | rgb(43, 43, 158) |
| HSL | hsl(240, 57%, 39%) |
| OKLCH | oklch(37.8% 0.179 273.7) |
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 #2B2B9E | 10.81:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #2B2B9E | 1.94:1 | Fails | Lc 9.7 | Not readable |
| #2B2B9E text on white | 10.81:1 | AAA | Lc 94.2 | Preferred for body text |
| #2B2B9E text on black | 1.94:1 | Fails | Lc -8.4 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ADBDFF
oklch(81% 0.095 273.6)
-
Step 400
400
#8397FF
oklch(70.7% 0.153 273.6)
-
Step 500
500
#6778FF
oklch(63% 0.199 273.8)
-
Step 600
600
#4F55FF
oklch(55.7% 0.246 273.5)
-
Step 700
700
#412CF9
oklch(49.1% 0.278 273.6)
-
Step 800
800
#3429C9
oklch(42.7% 0.231 273.6)
-
Step 900
900 (this color)
#2B2B9E
oklch(37.8% 0.179 273.7)
-
Step 950
950
#181B5C
oklch(26.9% 0.114 273.8)
#2B2B9E 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) | #0043A1 | 0.056 |
| Deuteranopia (no green cones) | #00389C | 0.039 |
| Tritanopia (no blue cones) | #004B61 | 0.141 |
| Achromatopsia (no color) | #3D3D3D | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B2B9E
#2B2B9E
oklch(37.8% 0.179 273.7)
- #4F4000
#4F4000
oklch(37.6% 0.077 93.9)
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 #2B2B9E, closest first.
No curated palette has a color within ΔE 0.04 of #2B2B9E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.035
- Indigo Blue #3A18B1 ΔE 0.042
- Ultramarine #2000B1 ΔE 0.058
- Imperial Purple #480CA8 ΔE 0.059
- Royal #0C1793 ΔE 0.061
- Cobalt Blue #030AA7 ΔE 0.068
- Blueberry #464196 ΔE 0.071
- Cobalt #1E488F ΔE 0.073
Use #2B2B9E 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.