#2A5689
Closest named color: Dusk Blue (#26538D). oklch(44.8% 0.097 253.7), rgb(42, 86, 137).
Aa
White text reads best on this color (7.52:1).
About this color
#2A5689 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.097 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.013 away. White text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.79:1 |
| White text | 7.52:1 |
Values
| HEX | #2A5689 |
| RGB | rgb(42, 86, 137) |
| HSL | hsl(212, 53%, 35%) |
| OKLCH | oklch(44.8% 0.097 253.7) |
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 #2A5689 | 7.52:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #2A5689 | 2.79:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #2A5689 text on white | 7.52:1 | AAA | Lc 85.9 | Fine for body text |
| #2A5689 text on black | 2.79:1 | Fails | Lc -16.1 | 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 800.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#78A4D8
oklch(70.7% 0.09 253.1)
-
Step 500
500
#548CCE
oklch(63.1% 0.116 253.6)
-
Step 600
600
#3875BB
oklch(55.6% 0.126 253.7)
-
Step 700
700
#2A62A1
oklch(49.1% 0.117 253.5)
-
Step 800
800 (this color)
#2A5689
oklch(44.8% 0.097 253.7)
-
Step 900
900
#224369
oklch(37.7% 0.076 253.3)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#2A5689 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) | #3F598B | 0.026 |
| Deuteranopia (no green cones) | #325088 | 0.018 |
| Tritanopia (no blue cones) | #006269 | 0.077 |
| Achromatopsia (no color) | #545454 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A5689
#2A5689
oklch(44.8% 0.097 253.7)
- #744B00
#744B00
oklch(44.8% 0.095 73.4)
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 #2A5689, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.013
- Light Navy Blue #2E5A88 ΔE 0.014
- Light Navy #155084 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.028
- YInMn Blue #415A77 ΔE 0.043
- Dusk #4E5481 ΔE 0.044
- Denim #3B638C ΔE 0.045
Use #2A5689 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.