#177EDC
Closest named color: Water Blue (#0E87CC). oklch(58.9% 0.167 252.1), rgb(23, 126, 220).
Aa
Black text reads best on this color (5.05:1).
About this color
#177EDC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.167 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.038 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #177EDC |
| RGB | rgb(23, 126, 220) |
| HSL | hsl(209, 81%, 48%) |
| OKLCH | oklch(58.9% 0.167 252.1) |
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 #177EDC | 4.15:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #177EDC | 5.05:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #177EDC text on white | 4.15:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #177EDC text on black | 5.05:1 | AA | Lc -33.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF5
oklch(88.6% 0.042 251.7)
-
Step 300
300
#9EC4F1
oklch(80.9% 0.076 253)
-
Step 400
400
#66A4E9
oklch(70.6% 0.12 252.2)
-
Step 500
500
#378CE3
oklch(63.1% 0.154 252.1)
-
Step 600
600 (this color)
#177EDC
oklch(58.9% 0.167 252.1)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#0F4375
oklch(37.8% 0.1 251.8)
-
Step 950
950
#0B2744
oklch(26.9% 0.064 252.1)
#177EDC 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) | #4D85E0 | 0.043 |
| Deuteranopia (no green cones) | #2675DA | 0.023 |
| Tritanopia (no blue cones) | #0095A2 | 0.124 |
| Achromatopsia (no color) | #7C7C7C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177EDC
#177EDC
oklch(58.9% 0.167 252.1)
- #AA6E00
#AA6E00
oklch(58.8% 0.126 71.9)
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 #177EDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.038
- Windows Blue #3778BF ΔE 0.045
- Clear Blue #247AFD ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.055
- Royal Blue #4169E1 ΔE 0.057
- Dodger Blue #1E90FF ΔE 0.067
- Cool Blue #4984B8 ΔE 0.068
Use #177EDC 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.