#127DB3
Closest named color: Nice Blue (#107AB0). oklch(56.1% 0.121 238.6), rgb(18, 125, 179).
Aa
Black text reads best on this color (4.61:1).
About this color
#127DB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.121 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.009 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.61:1 |
| White text | 4.55:1 |
Values
| HEX | #127DB3 |
| RGB | rgb(18, 125, 179) |
| HSL | hsl(200, 82%, 39%) |
| OKLCH | oklch(56.1% 0.121 238.6) |
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 #127DB3 | 4.55:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #127DB3 | 4.61:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #127DB3 text on white | 4.55:1 | AA | Lc 71.1 | Content text, not long reading |
| #127DB3 text on black | 4.61:1 | AA | Lc -30.5 | 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A1C6E0
oklch(80.8% 0.054 239)
-
Step 400
400
#6BA8D1
oklch(70.6% 0.087 239.1)
-
Step 500
500
#3E92C5
oklch(63.1% 0.111 238.8)
-
Step 600
600 (this color)
#127DB3
oklch(56.1% 0.121 238.6)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#06557C
oklch(42.8% 0.093 238.6)
-
Step 900
900
#134663
oklch(37.6% 0.072 238.4)
-
Step 950
950
#0E293A
oklch(26.9% 0.046 239.3)
#127DB3 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) | #637DB5 | 0.064 |
| Deuteranopia (no green cones) | #4E70B2 | 0.050 |
| Tritanopia (no blue cones) | #008B90 | 0.079 |
| Achromatopsia (no color) | #767676 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #127DB3
#127DB3
oklch(56.1% 0.121 238.6)
- #A8601D
#A8601D
oklch(56.1% 0.121 58.1)
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 #127DB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.009
- Windows Blue #3778BF ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.037
- Blue NCS #118AB2 ΔE 0.039
- Cerulean #457B9D ΔE 0.042
- Muted Blue #3B719F ΔE 0.042
- Cool Blue #4984B8 ΔE 0.043
Use #127DB3 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.