#177ABB
Closest named color: Nice Blue (#107AB0). oklch(55.9% 0.131 244.5), rgb(23, 122, 187).
Aa
White text reads best on this color (4.62:1).
About this color
#177ABB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.131 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.018 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #177ABB |
| RGB | rgb(23, 122, 187) |
| HSL | hsl(204, 78%, 41%) |
| OKLCH | oklch(55.9% 0.131 244.5) |
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 #177ABB | 4.62:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #177ABB | 4.53:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #177ABB text on white | 4.62:1 | AA | Lc 71.6 | Content text, not long reading |
| #177ABB text on black | 4.53:1 | AA | Lc -30.0 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A1C5E5
oklch(80.8% 0.06 245.5)
-
Step 400
400
#6CA7D8
oklch(70.7% 0.095 244.8)
-
Step 500
500
#4090CD
oklch(63.1% 0.121 244.5)
-
Step 600
600 (this color)
#177ABB
oklch(55.9% 0.131 244.5)
-
Step 700
700
#0166A0
oklch(49.2% 0.121 244.1)
-
Step 800
800
#0B5382
oklch(42.7% 0.101 244.7)
-
Step 900
900
#154568
oklch(37.7% 0.079 244.5)
-
Step 950
950
#0E293D
oklch(27.1% 0.05 243.6)
#177ABB 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) | #5B7CBE | 0.055 |
| Deuteranopia (no green cones) | #446EBA | 0.041 |
| Tritanopia (no blue cones) | #008A92 | 0.090 |
| Achromatopsia (no color) | #757575 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177ABB
#177ABB
oklch(55.9% 0.131 244.5)
- #A66200
#A66200
oklch(56% 0.126 64.7)
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 #177ABB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.018
- Windows Blue #3778BF ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.035
- Water Blue #0E87CC ΔE 0.041
- Steel Blue #4682B4 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.044
- Muted Blue #3B719F ΔE 0.047
- French Blue #436BAD ΔE 0.047
Use #177ABB 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.