#2B73A6
Closest named color: Flat Blue (#3C73A8). oklch(53.5% 0.107 243.4), rgb(43, 115, 166).
Aa
White text reads best on this color (5.11:1).
About this color
#2B73A6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.107 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.014 away. White text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #2B73A6 |
| RGB | rgb(43, 115, 166) |
| HSL | hsl(205, 59%, 41%) |
| OKLCH | oklch(53.5% 0.107 243.4) |
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 #2B73A6 | 5.11:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #2B73A6 | 4.10:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #2B73A6 text on white | 5.11:1 | AA | Lc 75.0 | Content text, not long reading |
| #2B73A6 text on black | 4.10:1 | AA large text | Lc -26.7 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A7C5DE
oklch(81% 0.048 243.5)
-
Step 400
400
#76A6CD
oklch(70.6% 0.077 243.7)
-
Step 500
500
#5190C0
oklch(63.1% 0.098 243.2)
-
Step 600
600 (this color)
#2B73A6
oklch(53.5% 0.107 243.4)
-
Step 700
700
#246694
oklch(49.1% 0.099 243.2)
-
Step 800
800
#205378
oklch(42.6% 0.082 243.5)
-
Step 900
900
#204561
oklch(37.7% 0.064 243.6)
-
Step 950
950
#142939
oklch(27.2% 0.04 243)
#2B73A6 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) | #5C74A8 | 0.049 |
| Deuteranopia (no green cones) | #4B69A5 | 0.037 |
| Tritanopia (no blue cones) | #007F85 | 0.074 |
| Achromatopsia (no color) | #6E6E6E | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B73A6
#2B73A6
oklch(53.5% 0.107 243.4)
- #985E1F
#985E1F
oklch(53.6% 0.107 63.4)
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 #2B73A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.014
- Muted Blue #3B719F ΔE 0.015
- Nice Blue #107AB0 ΔE 0.023
- Ocean Blue #03719C ΔE 0.025
- Dull Blue #49759C ΔE 0.031
- French Blue #436BAD ΔE 0.033
- Sea Blue #047495 ΔE 0.034
- Mid Blue #276AB3 ΔE 0.037
Use #2B73A6 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.