#1677DD
Closest named color: Cerulean Blue (#056EEE). oklch(57.4% 0.177 254.7), rgb(22, 119, 221).
Aa
Black text reads best on this color (4.71:1).
About this color
#1677DD is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.177 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.037 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #1677DD |
| RGB | rgb(22, 119, 221) |
| HSL | hsl(211, 82%, 48%) |
| OKLCH | oklch(57.4% 0.177 254.7) |
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 #1677DD | 4.45:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #1677DD | 4.71:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #1677DD text on white | 4.45:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #1677DD text on black | 4.71:1 | AA | Lc -31.4 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9EC4F4
oklch(81% 0.08 254.5)
-
Step 400
400
#67A3EE
oklch(70.6% 0.127 254.7)
-
Step 500
500
#3A8AE9
oklch(63.1% 0.163 254.8)
-
Step 600
600 (this color)
#1677DD
oklch(57.4% 0.177 254.7)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#054E97
oklch(42.8% 0.136 254.7)
-
Step 900
900
#114178
oklch(37.6% 0.106 254.9)
-
Step 950
950
#0C2746
oklch(27.1% 0.066 254)
#1677DD 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) | #3D81E1 | 0.038 |
| Deuteranopia (no green cones) | #0070DB | 0.021 |
| Tritanopia (no blue cones) | #00909F | 0.133 |
| Achromatopsia (no color) | #777777 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1677DD
#1677DD
oklch(57.4% 0.177 254.7)
- #A26C00
#A26C00
oklch(57.4% 0.121 74.6)
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 #1677DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.037
- Royal Blue #4169E1 ΔE 0.041
- Windows Blue #3778BF ΔE 0.049
- Clear Blue #247AFD ΔE 0.050
- Water Blue #0E87CC ΔE 0.055
- Neon Blue #4361EE ΔE 0.064
- Bright Blue #0165FC ΔE 0.067
- Azul #1D5DEC ΔE 0.069
Use #1677DD 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.