#1B65A3
Closest named color: Peacock Blue (#016795). oklch(49.5% 0.121 248.9), rgb(27, 101, 163).
Aa
White text reads best on this color (6.11:1).
About this color
#1B65A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.121 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.027 away. White text reads best on it, at 6.11:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #1B65A3 |
| RGB | rgb(27, 101, 163) |
| HSL | hsl(207, 72%, 37%) |
| OKLCH | oklch(49.5% 0.121 248.9) |
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 #1B65A3 | 6.11:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #1B65A3 | 3.43:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #1B65A3 text on white | 6.11:1 | AA | Lc 80.1 | Fine for body text |
| #1B65A3 text on black | 3.43:1 | AA large text | Lc -21.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEE
oklch(88.4% 0.033 249.6)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#71A5D9
oklch(70.6% 0.095 249.3)
-
Step 500
500
#498ECF
oklch(63.1% 0.121 249.1)
-
Step 600
600
#2877BC
oklch(55.6% 0.131 249.1)
-
Step 700
700 (this color)
#1B65A3
oklch(49.5% 0.121 248.9)
-
Step 800
800
#185283
oklch(42.8% 0.1 248.5)
-
Step 900
900
#1B4469
oklch(37.7% 0.078 248.6)
-
Step 950
950
#11283D
oklch(26.9% 0.049 248.1)
#1B65A3 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) | #4769A6 | 0.041 |
| Deuteranopia (no green cones) | #335CA2 | 0.028 |
| Tritanopia (no blue cones) | #00747C | 0.088 |
| Achromatopsia (no color) | #626262 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B65A3
#1B65A3
oklch(49.5% 0.121 248.9)
- #895400
#895400
oklch(49.5% 0.108 68.4)
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 #1B65A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.027
- Mid Blue #276AB3 ΔE 0.030
- Ocean Blue #03719C ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.039
- Denim #3B638C ΔE 0.041
- French Blue #436BAD ΔE 0.042
- Dusky Blue #475F94 ΔE 0.043
- Muted Blue #3B719F ΔE 0.047
Use #1B65A3 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.