#2157A5
Closest named color: Dusk Blue (#26538D). oklch(46.5% 0.138 258.2), rgb(33, 87, 165).
Aa
White text reads best on this color (7.06:1).
About this color
#2157A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.138 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.039 away. White text reads best on it, at 7.06:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.97:1 |
| White text | 7.06:1 |
Values
| HEX | #2157A5 |
| RGB | rgb(33, 87, 165) |
| HSL | hsl(215, 67%, 39%) |
| OKLCH | oklch(46.5% 0.138 258.2) |
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 #2157A5 | 7.06:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #2157A5 | 2.97:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #2157A5 text on white | 7.06:1 | AAA | Lc 84.1 | Fine for body text |
| #2157A5 text on black | 2.97:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C2EC
oklch(80.8% 0.067 258.4)
-
Step 400
400
#76A2E3
oklch(70.7% 0.107 258)
-
Step 500
500
#5389DB
oklch(63.1% 0.137 258.5)
-
Step 600
600
#3671C8
oklch(55.4% 0.149 258.2)
-
Step 700
700 (this color)
#2157A5
oklch(46.5% 0.138 258.2)
-
Step 800
800
#234E8C
oklch(42.8% 0.113 257.9)
-
Step 900
900
#214170
oklch(37.6% 0.089 258)
-
Step 950
950
#142642
oklch(26.9% 0.058 258.9)
#2157A5 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) | #2C5FA8 | 0.026 |
| Deuteranopia (no green cones) | #0653A3 | 0.019 |
| Tritanopia (no blue cones) | #006A76 | 0.107 |
| Achromatopsia (no color) | #585858 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2157A5
#2157A5
oklch(46.5% 0.138 258.2)
- #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 #2157A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.050
- Cobalt #1E488F ΔE 0.053
- Dusky Blue #475F94 ΔE 0.056
- Mid Blue #276AB3 ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Peacock Blue #016795 ΔE 0.057
Use #2157A5 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.