#177AA9
Closest named color: Nice Blue (#107AB0). oklch(54.9% 0.111 236), rgb(23, 122, 169).
Aa
White text reads best on this color (4.78:1).
About this color
#177AA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.111 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.011 away. White text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.39:1 |
| White text | 4.78:1 |
Values
| HEX | #177AA9 |
| RGB | rgb(23, 122, 169) |
| HSL | hsl(199, 76%, 38%) |
| OKLCH | oklch(54.9% 0.111 236) |
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 #177AA9 | 4.78:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #177AA9 | 4.39:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #177AA9 text on white | 4.78:1 | AA | Lc 72.7 | Content text, not long reading |
| #177AA9 text on black | 4.39:1 | AA large text | Lc -29.0 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A2C6DD
oklch(80.8% 0.05 236.3)
-
Step 400
400
#6EA9CC
oklch(70.8% 0.08 235.6)
-
Step 500
500
#4393BF
oklch(63.2% 0.102 235.7)
-
Step 600
600 (this color)
#177AA9
oklch(54.9% 0.111 236)
-
Step 700
700
#076893
oklch(49% 0.104 236.3)
-
Step 800
800
#0F5577
oklch(42.6% 0.085 236.2)
-
Step 900
900
#174760
oklch(37.8% 0.066 235.3)
-
Step 950
950
#0F2938
oklch(26.8% 0.042 236.6)
#177AA9 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) | #637AAB | 0.065 |
| Deuteranopia (no green cones) | #506DA8 | 0.052 |
| Tritanopia (no blue cones) | #00868A | 0.070 |
| Achromatopsia (no color) | #727272 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177AA9
#177AA9
oklch(54.9% 0.111 236)
- #A25E28
#A25E28
oklch(55% 0.111 55.8)
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 #177AA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.011
- Flat Blue #3C73A8 ΔE 0.027
- Muted Blue #3B719F ΔE 0.031
- Ocean Blue #03719C ΔE 0.032
- Sea Blue #047495 ΔE 0.035
- Cerulean #457B9D ΔE 0.035
- Dull Blue #49759C ΔE 0.037
- Ocean #017B92 ΔE 0.039
Use #177AA9 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.