#1651AB
Closest named color: Cobalt (#1E488F). oklch(45.4% 0.156 259.4), rgb(22, 81, 171).
Aa
White text reads best on this color (7.50:1).
About this color
#1651AB is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.156 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.049 away. White text reads best on it, at 7.50:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #1651AB |
| RGB | rgb(22, 81, 171) |
| HSL | hsl(216, 77%, 38%) |
| OKLCH | oklch(45.4% 0.156 259.4) |
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 #1651AB | 7.50:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #1651AB | 2.79:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #1651AB text on white | 7.50:1 | AAA | Lc 85.5 | Fine for body text |
| #1651AB text on black | 2.79:1 | Fails | Lc -16.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9EC2FC
oklch(80.9% 0.091 259.8)
-
Step 400
400
#67A0FB
oklch(70.7% 0.147 259.4)
-
Step 500
500
#3C85F8
oklch(63.1% 0.187 259.3)
-
Step 600
600
#176BE7
oklch(55.6% 0.203 259.4)
-
Step 700
700
#0658C9
oklch(49% 0.189 259.4)
-
Step 800
800 (this color)
#1651AB
oklch(45.4% 0.156 259.4)
-
Step 900
900
#143E81
oklch(37.7% 0.122 259.7)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#1651AB 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) | #0E5CAE | 0.029 |
| Deuteranopia (no green cones) | #004EA9 | 0.013 |
| Tritanopia (no blue cones) | #006776 | 0.119 |
| Achromatopsia (no color) | #555555 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1651AB
#1651AB
oklch(45.4% 0.156 259.4)
- #724F00
#724F00
oklch(45.4% 0.094 79.2)
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 #1651AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.049
- Dusk Blue #26538D ΔE 0.051
- Blue Blue #2242C7 ΔE 0.057
- Sapphire #2138AB ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.062
- Light Navy #155084 ΔE 0.064
- Blueberry #464196 ΔE 0.065
- Light Navy Blue #2E5A88 ΔE 0.069
Use #1651AB 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.