#2A558F
Closest named color: Dusk Blue (#26538D). oklch(44.9% 0.107 256.6), rgb(42, 85, 143).
Aa
White text reads best on this color (7.51:1).
About this color
#2A558F is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.107 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.008 away. White text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #2A558F |
| RGB | rgb(42, 85, 143) |
| HSL | hsl(214, 55%, 36%) |
| OKLCH | oklch(44.9% 0.107 256.6) |
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 #2A558F | 7.51:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #2A558F | 2.79:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #2A558F text on white | 7.51:1 | AAA | Lc 85.9 | Fine for body text |
| #2A558F text on black | 2.79:1 | Fails | Lc -16.2 | 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
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF0
oklch(88.6% 0.034 255.2)
-
Step 300
300
#A7C3E9
oklch(80.9% 0.062 256.1)
-
Step 400
400
#77A3DE
oklch(70.7% 0.099 256)
-
Step 500
500
#548AD5
oklch(63% 0.128 256.9)
-
Step 600
600
#3873C3
oklch(55.6% 0.139 256.8)
-
Step 700
700
#2A60A8
oklch(49.1% 0.129 256.7)
-
Step 800
800 (this color)
#2A558F
oklch(44.9% 0.107 256.6)
-
Step 900
900
#22426D
oklch(37.7% 0.083 256.4)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#2A558F 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) | #3A5A91 | 0.024 |
| Deuteranopia (no green cones) | #2B508E | 0.014 |
| Tritanopia (no blue cones) | #00626B | 0.084 |
| Achromatopsia (no color) | #545454 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A558F
#2A558F
oklch(44.9% 0.107 256.6)
- #724D00
#724D00
oklch(45% 0.094 77)
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 #2A558F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.008
- Light Navy Blue #2E5A88 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.027
- Light Navy #155084 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.033
- Cobalt #1E488F ΔE 0.041
- Twilight #4E518B ΔE 0.044
- Dusky Blue #475F94 ΔE 0.047
Use #2A558F 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.