#2B639A
Closest named color: Peacock Blue (#016795). oklch(49% 0.106 250.6), rgb(43, 99, 154).
Aa
White text reads best on this color (6.26:1).
About this color
#2B639A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.106 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.024 away. White text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #2B639A |
| RGB | rgb(43, 99, 154) |
| HSL | hsl(210, 56%, 39%) |
| OKLCH | oklch(49% 0.106 250.6) |
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 #2B639A | 6.26:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #2B639A | 3.35:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #2B639A text on white | 6.26:1 | AA | Lc 80.9 | Fine for body text |
| #2B639A text on black | 3.35:1 | AA large text | Lc -20.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#79A5D3
oklch(70.8% 0.083 250.2)
-
Step 500
500
#568DC7
oklch(63% 0.106 251)
-
Step 600
600
#3A77B3
oklch(55.7% 0.113 250.2)
-
Step 700
700 (this color)
#2B639A
oklch(49% 0.106 250.6)
-
Step 800
800
#25517D
oklch(42.6% 0.088 250.7)
-
Step 900
900
#234465
oklch(37.8% 0.069 250.1)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#2B639A 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) | #4A669C | 0.034 |
| Deuteranopia (no green cones) | #3A5C99 | 0.022 |
| Tritanopia (no blue cones) | #007077 | 0.081 |
| Achromatopsia (no color) | #606060 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B639A
#2B639A
oklch(49% 0.106 250.6)
- #855400
#855400
oklch(48.9% 0.105 70.8)
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 #2B639A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.026
- Denim #3B638C ΔE 0.026
- Dusky Blue #475F94 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.041
- Ocean Blue #03719C ΔE 0.041
- French Blue #436BAD ΔE 0.045
Use #2B639A 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.