#2B5999
Closest named color: Denim Blue (#3B5B92). oklch(46.5% 0.116 257.2), rgb(43, 89, 153).
Aa
White text reads best on this color (7.01:1).
About this color
#2B5999 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.116 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.021 away. White text reads best on it, at 7.01:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #2B5999 |
| RGB | rgb(43, 89, 153) |
| HSL | hsl(215, 56%, 38%) |
| OKLCH | oklch(46.5% 0.116 257.2) |
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 #2B5999 | 7.01:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #2B5999 | 2.99:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #2B5999 text on white | 7.01:1 | AAA | Lc 84.0 | Fine for body text |
| #2B5999 text on black | 2.99:1 | Fails | Lc -17.9 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC2E5
oklch(80.8% 0.056 257.7)
-
Step 400
400
#7DA3D8
oklch(70.8% 0.089 256.8)
-
Step 500
500
#5B8BCE
oklch(63.2% 0.114 256.9)
-
Step 600
600
#4173BB
oklch(55.5% 0.125 257.6)
-
Step 700
700 (this color)
#2B5999
oklch(46.5% 0.116 257.2)
-
Step 800
800
#2A4F83
oklch(42.7% 0.097 257.2)
-
Step 900
900
#274269
oklch(37.7% 0.075 257.6)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#2B5999 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) | #3B5E9C | 0.024 |
| Deuteranopia (no green cones) | #295498 | 0.015 |
| Tritanopia (no blue cones) | #006871 | 0.092 |
| Achromatopsia (no color) | #595959 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5999
#2B5999
oklch(46.5% 0.116 257.2)
- #775100
#775100
oklch(46.5% 0.097 77.5)
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 #2B5999, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.021
- Dusk Blue #26538D ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.039
- Denim #3B638C ΔE 0.044
- Peacock Blue #016795 ΔE 0.044
- Light Navy #155084 ΔE 0.046
- Twilight #4E518B ΔE 0.047
Use #2B5999 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.